File No. 34956
This rule was published in the July 15, 2011, issue (Vol. 2011, No. 14) of the Utah State Bulletin.
Transportation, Motor Carrier
Standards for Utah School Buses
Notice of Proposed Rule
(Repeal and Reenact)
DAR File No.: 34956
Filed: 06/20/2011 05:19:24 PM
Purpose of the rule or reason for the change:
The purpose of this rule change is to update existing rule language governing the design and operation of school buses and eliminate duplicative regulations by incorporating the 2010 Standards for Utah School Buses and Operations with the 2010 Standards Appendix, and to enact regulations governing the placement of advertisements on school buses.
Summary of the rule or change:
This change incorporates portions of the 2010 edition of the Standards for Utah School Buses and Operations and Appendix, repeals duplicative regulations, and adds provisions required by Section 41-6a-1309 regulating the placement and size of advertisements on school buses. There are no substantive differences between the repealed rule and the incorporated portion of the Standards for Utah School Buses and Operations and Appendix which are incorporated into the reenacted rule.
State statutory or constitutional authorization for this rule:
- Section 41-6a-1309
- Section 41-6a-1304
This rule or change incorporates by reference the following material:
- Updates Standards for Utah School Buses and Operations and Appendix, published by Utah State Office of Education, 11/15/2010
- Adds Standards for Utah School Buses and Operations, 2010 Edition, Appendix, Utah Specific - Glossary, published by Utah State Office of Education, 11/15/2010
Anticipated cost or savings to:
the state budget:
There are no anticipated costs or savings to the state budget because the rule incorporates existing standards, eliminates duplicative regulations, and adds regulations for advertising on school buses.
There are no anticipated costs or savings to local government because the rule incorporates existing standards, eliminates duplicative regulations, and adds regulations for advertising on school buses.
There are no anticipated costs or savings to small business because the rule incorporates existing standards, eliminates duplicative regulations, and adds regulations for advertising on school buses.
persons other than small businesses, businesses, or local governmental entities:
There are no anticipated costs or savings to persons other than small businesses, businesses, or local government because the rule incorporates existing standards, eliminates duplicative regulations, and adds regulations for advertising on school buses.
Compliance costs for affected persons:
There are no anticipated compliance costs for affected persons because the rule incorporates existing standards, eliminates duplicative regulations, and adds regulations for advertising on school buses.
Comments by the department head on the fiscal impact the rule may have on businesses:
There are no anticipated fiscal impacts to businesses because the rule incorporates existing standards, eliminates duplicative regulations, and adds regulations for advertising on school buses.
John Njord, Executive Director
The full text of this rule may be inspected, during regular business hours, at the Division of Administrative Rules, or at:Transportation
4501 S 2700 W
SALT LAKE CITY, UT 84119-5998
Direct questions regarding this rule to:
- Linda Barrow at the above address, by phone at 801-965-4026, by FAX at 801-965-4338, or by Internet E-mail at email@example.com
Interested persons may present their views on this rule by submitting written comments to the address above no later than 5:00 p.m. on:
This rule may become effective on:
John Njord, Executive Director
R909. Transportation, Motor Carrier.
R909-3. Standards for Utah School Buses.
R909-3-1. Scope and Objectives.
(1) This document sets forth requirements for the design,
construction, and operation of all school buses utilized, whether
owned or leased by any school district, or privately owned and
operated under contract with any school district. Local school
districts and private schools have the responsibility for
developing the specifications for and the procurement of school
buses used in their pupil transportation programs and shall
insure that their vehicles meet or exceed the standards contained
herein. School districts are encouraged to specify requirements
in excess of the standards whenever such action will enhance
their transportation programs. Any additions of school bus
equipment or alterations in the bus construction and operations
not provided for in the Standards for Utah School Buses and
Operations, 1994 Edition are prohibited without prior approval as
outlined in Part H entitled "Exemption from or Modification
(2) Standards for Utah School Buses and Operations, 1994
Edition replaces the 1987 Standards for Utah School Buses and
Operations. These standards will be effective August 31, 1994.
All school buses ordered after the effective date and all school
bus operators shall meet these standards. This document is
intended to provide standards that meet or exceed Federal Motor
Vehicle Safety Standards now in effect. Federal standards and
Utah Motor Vehicle laws shall govern instances not specifically
covered in these standards.
(3) Pupil transportation vehicles ordered before January
1, 1994 shall meet or exceed the Standards for Utah School Buses
and Operations applicable at the time of order
R909-3-2. Authority. (1) These standards are issued under authority of Title
41 of the Utah Code Annotated which deals with the Utah State
Department of Transportation. This statute, at 41-6a-1304, states
"...The Department of Transportation by and with the advice
of the State Board of Education and the Department of Public
Safety shall adopt and enforce regulations not inconsistent with
this chapter to govern the design and operation of all school
buses when owned and operated by any school district or privately
owned and operated under contract with any school district in
this state, and such regulations shall by reference be made a
part of any such contract with a school district. Every school
district, its officers and employees, and every person employed
under contract by a school district shall be subject to said
(2) Regulations contained herein are applicable to public
schools and all operations under the jurisdiction of the State
Board of Education. For standards or regulations applicable to
private schools, refer to the Utah Code or regulations adopted by
the Department of Transportation through Utah's Rule Making
Act and published as a separate document.
R909-3-3. Responsibilities of Suppliers. (1) School bus chassis and/or body dealers, distributors,
and manufacturers must comply with the Standards for Utah School
Buses and Operations, 1994 Edition. The bidder agrees to certify
that the vehicle meets or exceeds all federal and state standards
upon delivery of the vehicle.
(2) Certification: All manufacturers of school bus
chassis, bodies, or complete buses desiring to supply such
equipment for use in the State of Utah, shall provide the Pupil
Transportation Specialist, Utah State Office of Education, and
the Division of Safety, Utah Department of Transportation, with a
certification that their products, identified by specific model
numbers, meet or exceed all requirements of the Federal Motor
Vehicle Safety Standards and the Standards for Utah School Buses
and Operations, 1994 Edition. This certification must be
accomplished before any equipment is supplied in the state and
not later than February 1 of each succeeding calendar year.
Manufacturers shall also provide such test data or other
information necessary to substantiate their claim of compliance.
Required supporting data are listed below:
(a) Supporting data for certification of school bus
chassis shall include at least the following information, but may
be supplemented with additional information if offered by the
supplier or if requested by the purchaser:
(i) Manufacturer's gross vehicle weight
(ii) Chassis weight, overall dimensions, and location of
the center of gravity.
(iii) Engine performance curves (horse power torque vs.
speed in revolutions per minute).
(iv) Power and gradient curves (with representative bus
(v) Exhaust system noise level.
(vi) Engine emission levels.
(vii) Axle capacities.
(viii) Spring capacities.
(ix) Brake system parameters or stopping distance vs.
speed (with representative bus bodies).
(x) Horn noise level.
(xi) Temperature and quantity of hot water available for
use in heating system.
(xii) Alternator output at the normal operating speed of
the engine and at the engine manufacturer's recommended idle
(xiii) Supporting data for certification of school bus
bodies shall include, but not be limited to:
(A) Body dimensions, weights, and location of the center
(B) Data from crash-worthiness tests conducted in
accordance with Appendix 1. (Manufacturers will attach
certification plate signifying vehicle compliance with Colorado
(C) Data to verify compliance with the passenger seat
cushion retention requirements as contained in FMVSS.
(D) Data to verify compliance with the passenger seat
attachment strength requirements as contained in FMVSS.
(b) All certifications and supporting data shall be sent
to the Pupil Transportation Specialist, Utah State Office of
Education, 250 East 500 South, Salt Lake City, Utah 84111, and
Safety Regulations Administrator, U.D.O.T., Office of Motor
Carriers, 4501 South 2700 West, Salt Lake City, Utah
(c) A list of the certified bus manufacturers will be
provided to the districts by March 1st each year.
(3) Delivery Requirements: The school bus manufacturer
shall provide the following materials for the purchaser of a new
school bus at the time the purchaser takes possession of the
(a) Line set tickets for each individual unit of the bus,
and a separate set of tickets for buses manufactured in two
(b) A copy of the pre-delivery service performed and
verified by a checkout form for each individual unit.
(c) Warranty book and statement of warranty for each
individual unit. All warranties shall commence on the day that
the purchaser takes possession of the completed bus.
(d) Service manual for each individual unit or group of
(e) Parts manual for each individual unit or group of
(4) Inspection and acceptance testing of new school
buses: Not more than 30 days following delivery of any new school
bus to a Utah school district, it shall be inspected by the
Safety Inspection Office of the Utah Highway Patrol. Prior to any
new school bus being placed into service, it shall be inspected
and tested by a certified mechanic to verify conformance with
(a) Tests that will be conducted during the acceptance
inspection of a school bus shall include, at a minimum:
(i) Inventory of required safety features including
(ii) Functions tests of all lamps and signals, emergency
braking system, horn, and other operating systems.
(b) Failure to satisfy all requirements of the standards
shall result in either the bus being given a provisional approval
until the manufacturer brings the vehicle up to standards, an
exemption from the subject requirement requested (See Part H), or
the vehicle will be deadlined pending compliance. A provisional
approval shall not be for more than 90 consecutive days. Failure
to bring the bus up to standards or apply for an exemption during
the provisional period shall result in the bus being
(5) Body-On-Chassis Type School Bus: In case a school
district elects to contract with one of two or more manufacturers
who then subcontracts with the other manufacturers, it shall be
the responsibility of the end supplier, as prime contractor, to
assure that the completed bus satisfies both the chassis and body
(6) Notice of Noncompliance: Dealers, distributors, or
manufacturers who supply school transportation vehicles in the
State of Utah that do not comply with the Standards for Utah
School Buses and Operations, 1994 Edition shall be notified of
noncompliance and a general notice will be sent to all school
districts and school transportation supervisors within the state
advising that equipment supplied by the specified dealer,
distributor, or manufacturer is not in compliance with Utah
(7) If a dealer, distributor, or manufacturer has been
notified of noncompliance in accordance with paragraph 3.06 and
replaces or modifies the equipment to make it comply with the
Utah Standards, a notice of compliance will be issued within 30
days after proof of compliance.
(8) School bus manufacturers shall be given at least 90
days notification of any changes in the Standards for Utah School
Buses and Operations, 1994 Edition.
R909-3-4. Definitions. (1) School bus designations used in this document are
taken from the Ninth National Minimum Standards Conference on
School Transportation (1980). It should be noted vehicles with a
capacity for less than ten passengers cannot be certified as
school buses under federal regulations.
(2) School Bus means every motor vehicle designed to
carry more than ten persons and is used to transport school
children to or from school or in connection with related
activities. This definition does not include vehicles that only
carry school children along with other passengers as part of the
operation of a common carrier under the jurisdiction of the Utah
Department of Transportation or Public Service Commission or
those vehicles in informal or intermittent arrangements such as
sharing of actual gasoline expense or participation in a car pool
for the transportation of children to or from school or other
school activity. Nor does this definition include
"tour" type buses, whether owned, leased, or chartered
by a school district solely for the purpose of transporting
school children to and from non-academic events.
(3) TYPE A - A Type "A" school bus is a
conversion or body constructed upon a van-type compact truck or a
front-section vehicle, with a gross weight rating of 10,000
pounds or less, designed for carrying more than ten
(4) TYPE B - A Type "B" school bus is a
conversion or body constructed and installed upon a van or
front-section vehicle chassis, or stripped chassis, with a
vehicle weight rating of more than 10,000 pounds, designed for
carrying more than ten persons. Part of the engine is beneath
and/or behind the windshield and beside the driver's seat.
The entrance door is behind the front wheels.
(5) TYPE C - A Type "C" school bus is a body
installed upon a flat back cowl chassis with a gross vehicle
weight rating of more than 10,000 pounds, designed for carrying
more than ten persons. All of the engine is in front of the
windshield and the entrance door is behind the front
(6) TYPE D - A Type "D" school bus is a body
installed upon a chassis, with the engine mounted in the front,
midships, or rear, with a gross vehicle weight rating of more
than 10,000 pounds, designed for carrying more than ten persons.
The engine may be behind the windshield and beside the
driver's seat; it may be at the rear of the bus, behind the
rear wheels, or midships between the front and rear axles. The
entrance door is ahead of the front wheels.
(7) Multipurpose Passenger Vehicle (MP) means every motor
vehicle with ten or less passenger positions (including the
driver) and cannot be certified as a bus. (In determining
passenger capacity, wheelchair positions are counted as passenger
positions.) Although a school entity may use such a vehicle as
station wagon, full-sized sedan, small van of non-school bus
capacity, etc., to transport pupils to and from school or related
events, the vehicle shall not be identified as a school bus
(including color) and shall not stop or control traffic on the
traveled portion of the roadway to load or unload
R909-3-5. Chassis Requirements. (1) Air Cleaner
(a) The engine intake air system shall be furnished and
properly installed by the chassis manufacturer to meet engine
(b) The intake air system for diesel engines may have an
air cleaner restriction indicator properly installed by the
chassis manufacturer to meet engine specifications.
(a) Weight distribution of fully loaded bus on level
surface shall not exceed the manufacturer's front gross axle
weight rating and rear gross axle weight rating.
(b) The front and rear ends, including suspension
assemblies, shall have a gross axle weight rating at ground, at
least equal to that portion of the load as would be imposed by
the chassis manufacturer's maximum gross vehicle weight
(c) Two-speed rear axles are permissible, but if used,
provisions shall be made to assure that the parking and emergency
brake systems operate directly upon the rear axles or wheels and
not upon the driveshaft.
(3) Block Heater
(a) Buses furnished with diesel engines must have an
engine block heater, 110 volt minimum 700 watt with 400 CID or
less engine and minimum 1000 watt for engines over 400 CID. They
shall also be furnished with an ether/propane quick starting aid
that is thermostatically controlled and pre-shot measurement
type. (Exception: Diesel engines that are equipped with glow plug
or air intake starting systems.)
(4) Brake Systems
(a) All buses larger than 49 passenger capacity
(including driver) or furnished with a two-speed axle must be
equipped with air brakes. Automatic slack adjusters shall be
required on all air-brake equipped buses following adoption of
this edition of the Standards.
(b) If the bus is equipped with a two-speed rear axle,
the parking brake system shall operate directly upon the rear
axle or wheels such that the parking brake system will not be
disconnected from the wheels when the rear axle is in the neutral
position. (Drive shaft brakes do not meet this
(c) Vacuum Assist Systems:
(i) A gauge giving the value of the vacuum in the
reservoir, in inches of mercury, shall be located in clear view
of the driver.
(ii) An audible and visual signal shall be provided to
warn the driver in case the vacuum in the reservoir is eight
inches of mercury or less.
(d) Air Brake Systems:
(i) The compressor used in an air brake system shall be a
minimum of 12 cubic feet and be driven by the engine.
(ii) Reservoir(s) shall be a minimum combined capacity of
3,750 cubic inches, except Type D buses for which the capacity
shall be 4,500 cubic inches.
(A). There shall be a manually operated or an automatic
condensation drain valve in each reservoir. If an automatic
valve(s) is used it must be heated to prevent freezing.
(B). There shall be a safety valve installed in the first
reservoir, which shall be set to release pressure should the
reservoir pressure exceed 150 psi.
(iii) All tubing and hoses used in the air brake systems
shall conform to applicable SAE standards and shall be installed
so as to be protected against excessive heat and to accommodate
the normal vibrations and motions of the vehicle without
(iv) The low pressure warning signal shall be both
audible and visual.
(v) Buses using air or vacuum in the operation of the
brake system shall be equipped with warning signals, readily
audible and visible to the driver, that will give a continuous
warning when the air pressure available in the system for braking
is 60 pounds per square inch (psi) or less or the vacuum in the
system available for braking is eight (8) inches of mercury or
less. An illuminated gauge shall be provided that will indicate
to the driver the air pressure in pounds per square inch or the
vacuum available for the operation of the brakes as shown in
inches of mercury. Type A buses: Manufacturers'
(A). Vacuum-assist brake systems shall have a reservoir
used exclusively for brakes that shall be adequate to ensure
against loss in vacuum at full stroke application if not more
than 30 percent with the engine not running. Brake system on
gas-powered buses shall include suitable and convenient
connections for the installation of a separate vacuum
(B). Any brake system dry reservoir shall be so
safeguarded by a check valve or equivalent device, that in the
event of failure or leakage in its connection to the source of
compressed air or vacuum, the stored dry air or vacuum shall not
be depleted by the leakage or failure.
(vi) Buses using a hydraulic-assist brake system shall be
equipped with warning signals, readily audible and visible to the
driver, that will provide continuous warning in the event of a
loss of fluid flow from primary source or loss of electric source
powering the back-up system. Type A buses: Manufacturers'
(vii) The brake lines and booster-assist lines shall be
protected from excessive heat and vibration and shall be
installed in a manner that prevents chafing.
(viii) Air Dryer (optional): If required, shall be
compatible with the air compressor. The expello valve of the air
dryer shall be heated to prevent freezing.
(iv) Anti-lock braking systems, meeting
manufacturers' standards, are approved optional
(e) Parking Brake System: The school bus shall at all
times be equipped with a parking brake system adequate to hold
the vehicle or combination on any grade on which it is operated
under any condition of loading on a surface free from ice and
(f) All brake systems should be designed to permit visual
inspection of brake lining wear without removal of any chassis
(5) Cooling System
(a) The engine cooling system radiator shall be of
sufficient capacity to cool the engine at all speeds in all
gears. It shall be of heavy duty type with increased capacity for
high altitude operation. A coolant recovery or surge tank system
is required on all type A, B, C, and D buses.
(b) The cooling system fan shall be of heavy duty design
and shall include a fan clutch.
(c) The cooling system shall be equipped with a heavy
duty truck type water pump.
(d) Permanent ethylene-glycol base antifreeze shall be
provided by the chassis manufacturer to protect the cooling
system to at least 40 degrees below zero Fahrenheit.
(e) When a chassis is equipped with an automatic
transmission, a heavy duty cooling system with increased capacity
in the radiator, fan, transmission cooler, and other necessary
components to provide for the additional cooling required by the
automatic transmission shall be furnished.
(f) Shutters (optional): Radiator shutters, when
required, shall be air, hydraulic, or vacuum operated and shall
be of the shutter-stat temperature control type. A petcock shall
be furnished at the air or vacuum supply to shut off supply from
air or vacuum source.
(6) Bumper, Front
(a) Energy-absorbing bumpers are not permitted.
(b) Front bumper shall be furnished by chassis
manufacturer as part of the chassis on type A, B, and C buses.
When type D chassis are supplied to a body company by a chassis
manufacturer, the body company shall supply the front bumper as
part of the body installation.
(c) The front bumper shall be heavy-duty channel steel of
one-piece construction at least 3/16-inch thick and not less than
an 8-inch face after forming. (Exception: Type A vehicle at least
(d) The front bumper shall be of wrap-around design
extended to offer maximum protection of fender lines without
permitting snagging or hooking.
(e) The front bumper shall be attached to the frame and
extend forward of grille, head lamps, fender, or hood.
(f) The front bumper shall permit the bus to be lifted by
a vertical force applied to the bottom of the bumper without
damaging either the bumper or its mountings.
(a) School bus chassis using manual transmission shall be
equipped with a heavy-duty single-disc truck clutch with a
diameter not less than the minimum dimensions given below, or a
dual disc unit of similar capacity:
10 to 30 passenger bus 11-inch diameter
31 to 42 passenger bus 12-inch diameter
43 passenger or larger bus 13-inch diameter
(b) Clutch torque capacity shall be equal to or greater
than the engine torque output.
(a) Chassis and front bumper shall be black. Hood, cowl,
and fenders shall be in National School Bus Yellow. Wheels shall
be the color used by manufacturers.
(9) Drive Shaft
(a) Drive shaft shall be protected by a metal guard or
guards around circumference of the drive shaft to reduce the
possibility of it whipping through the floor or dropping to the
ground if broken.
(10) Electrical System
(a) All buses shall be equipped with at least a 12-volt
(b) Battery: A storage battery shall be provided which is
of sufficient capacity to take care of starting the engine,
lighting, signal devices, heating, and other electrical equipment
and shall be compatible with the size alternator supplied with
the chassis. Minimum capacities are specified below:
Bus Type Cold Cranking
Amperes at 0 degrees F.
Types A and B - gas 515 Amperes.
Types C and D - gas 800 Amperes.
Types A, B, C, D - diesel 1,000 Amperes.
(c) Storage battery shall have minimum cold cranking
capacity rating equal to the cranking current required for 30
seconds at 0 degrees Fahrenheit (-17.8c) and a minimum reserve
capacity rating of 120 minutes at 25 amps. Higher capacities may
be required depending upon optional equipment and local
(d) Since all batteries in Type B, C, and D buses are to
be located in a sliding tray, the battery shall be temporarily
mounted on the chassis frame by the chassis
(e) Generator or Alternator.
(i) Generating Unit: All school buses shall be equipped
with an engine driven alternator with rectifier capable of
producing the minimum current specified, and capable of producing
30 percent of its maximum rated output at the normal engine idle
(ii) The generating or alternating unit shall be driven
by a dual or serpentine belt system directly from the crankshaft
or a positive-driven accessory shaft of the engine. (Exception:
Type A and B buses rated 14,500 lb. GVW or less.)
(iii) Type A bus shall have a minimum 65 ampere hour
alternator; type B bus rated over 15,000 lb. GVW shall be
equipped with a heavy duty truck or bus type alternator meeting
SAE J 180, having minimum output rating of 100 amperes; type B
buses rated at 14,500 GVW or less shall have an alternator rated
at 80 amperes; type C bus alternators shall have a rating of 120
amperes; type D bus alternators shall have a rating of 160
(iv) Type B, C, and D buses rated at 15,000 lb GVW or
more, shall have a generator or alternator with a minimum
charging rate of 30 amperes at manufacturer's recommended
engine idle speed (12 volt system), and shall be ventilated and
voltage controlled and, if necessary, current
(v) Type A, B, C, and D buses equipped with an electrical
power lift shall have a minimum 100 ampere hour
(vi) A direct-drive generator or alternator is
permissible in lieu of belt drive. Belt drive shall be capable of
handling the rated capacity of the generator or alternator with
no detrimental effect on other driven components.
(f) Regulator. The regulator(s) shall be of a fully
(i) The engine and frame shall be electrically
interconnected by a bonding strap of adequate size to assure
proper functioning of the electrical system.
(ii) All wiring shall conform to current applicable
recommended practices of the Society of Automotive
(iii) All wiring shall use a standard color and number
coding. Each chassis shall be delivered with a wiring diagram
that coincides with the wiring of the chassis.
(iv) Chassis manufacturer shall install a readily
accessible terminal strip or plug on the body side of the cowl,
or at an accessible location in the engine compartment of
vehicles designed without a cowl, that shall contain the
following terminals for the body connections:
(A) Main 100 amp body circuit.
(B) Tail lamps.
(C) Right turn signal.
(D) Left turn signal.
(E) Stop lamps.
(F) Back up lamps.
(G) Instrument panel lights (rheostat controlled by
(A) An appropriate identifying diagram (color and number
coded) for electrical circuits shall be provided to the body
manufacturer for distribution to the end user.
(vi) Engine Fire Extinguishers.
(A) Manufacturer may provide an automatic fire
extinguisher system in the engine compartment on gasoline-powered
(11) Exhaust System
(a) Exhaust pipe, muffler, and tailpipe shall be outside
bus body compartment and attached to chassis.
(b) Tailpipe shall be constructed of a
corrosion-resistant tubing material at least equal in strength
and durability to 16-gauge steel.
(c) Tailpipe may (a) extend beyond rear axle and extend
beyond outer shell but not beyond the bumper, and be mounted
outside of chassis frame rail at end point, or (b) extend to the
left side of the bus, behind the driver's compartment
outboard of chassis center line and extend to but not beyond the
perimeter of the body. Type A bus is manufacturer's standard.
On Type C and D buses, no exhaust pipe shall exit beneath an
emergency door or fuel fill.
(d) Exhaust system on gasoline-powered chassis shall be
properly insulated from fuel tank connections by a securely
attached metal shield at any point where it is twelve inches or
less from tank or tank connections.
(e) Muffler shall be constructed of corrosion-resistant
(12) Fenders, Front, Type C Vehicles
(a) Total spread of outer edges of front fenders,
measured at fender line, shall exceed total spread of front tires
when front wheels are in straight ahead position.
(b) Front fenders shall be properly braced and free from
any body attachments. Front fenders and hood must be tilt-away
type to allow maximum access to engine compartment.
(13) Frame and Passenger Load
(a) Gross vehicle weight (GVW) is the sum of the average
chassis weight, the average body weight, the driver's weight,
and total seated pupil weight. For purposes of calculation, the
driver's weight is 150 pounds, and the pupil weight is 120
pounds per pupil.
(b) Gross Vehicle Weight (GVW) shall not exceed the
chassis manufacturer's gross vehicle weight rating (GVWR) for
(c) Gross Vehicle Weight (GVW) shall not exceed 185
pounds per published net horse-power of the engine at the
manufacturer's recommended maximum revolutions per
(d) Manufacturers' gross vehicle weight ratings shall
be furnished in duplicate (unless more are requested) by
manufacturers to the state agency having pupil transportation
jurisdiction. The State agency shall, in turn, transmit such
ratings to other state agencies responsible for development or
enforcement of state standards for school buses.
(e) Chassis GVW Rating: The GVW used in design of the
chassis and its frame shall be the minimum GVW calculated in
Subsection 16.01 above or the next larger standard GVW rating
supplied by the manufacturer.
(f) Any secondary manufacturer that modifies the original
chassis frame shall guarantee workmanship and materials used in
(g) Any frame modification shall not be for the purpose
of extending the wheelbase.
(h) Holes in top or bottom flanges or side units of
frame, and welding to frame shall not be permitted except as
provided or accepted by chassis manufacturer.
(i) Frame Construction:
(i) Frame shall be designed to correspond with or exceed
standard performance criteria for heavy-duty trucks of same
general load specifications used for severe service.
(ii) When frame side members are used, they shall be of
one-piece construction; provided that if there is a necessity to
extend frame side members, such extension shall be designed and
furnished by chassis or body manufacturer with a guarantee and
installation shall be made by either body or chassis manufacturer
and guaranteed by company making the installation. Extensions of
frame lengths are permissible only when such alterations are
behind rear hanger of rear springs and shall not be for purpose
of extending wheelbase. All such extensions shall be of
sufficient material, quality, and strength to provide the same
support and durability of manufacturer's standard frame side
(iii) Chassis frame will extend to rear body cross
(iv) Welding to frame side rails which is necessary by
design to strengthen, modify, or alter basic vehicle
configuration shall be performed and guaranteed by the body or
chassis manufacturer making the modification.
(14) Fuel Tank
(a) Fuel tank or tanks of minimum 30-gallon capacity with
a 25-gallon actual draw shall be provided by the chassis
manufacturer for Types A, B, and C buses. Type C buses with a
passenger capacity of 36 or greater shall be supplied with a
60-gallon fuel tank. All Type D buses shall be provided with a
minimum 60-gallon fuel tank. The tank(s) shall be filled and
vented to the outside of the body, the location of which shall be
so that accidental fuel spillage will not drip or drain on any
part of the exhaust system.
(b) No portion of the fuel system that is located to the
rear of the engine compartment, except the filler tube, shall
extend above the top of the chassis frame rail. Fuel lines shall
be mounted to obtain maximum possible protection by the chassis
(c) Fuel filter with replaceable element shall be
installed between fuel tank and engine.
(d) If a tank size other than 30-gallon is supplied,
location of front of tank and filler spout must remain as
specified by SBMI Design Objectives, and the draw capacity shall
be 83% of the tank capacity. January 1985 edition.
(e) The fuel tank on vehicles constructed with a power
lift unit may be mounted on left chassis rail or behind rear
(f) Auxiliary tank may be added. Installation of
alternative fuel tanks shall comply with all applicable fire
(g) Fuel tank(s) may be mounted on left or right sides of
frame, either to the rear of the rear axle, front of the rear
axle between the wheelbase, or between the frame rails. All
installations must meet FMVSS 301.
(a) An engine governor is permissible. When it is desired
to limit road speed, a road speed governor should be
(b) When engine is remotely located from driver, a
governor shall be installed to limit engine speed to maximum
revolutions per minute recommended by engine manufacturer, or a
tachometer shall be installed so engine speed may be known to
(16) Heating System
(a) The chassis engine shall have plugged openings for
the purpose of supplying hot water for the bus heating system.
The opening shall be suitable for attaching 3/4-inch pipe
(b) The engine shall be capable of supplying water having
a temperature of at least 170 degrees Fahrenheit at a flow rate
of 50 pounds per minute at the return end of 30 feet of one inch
inside diameter automotive hot water heater hose.
(a) Bus shall be equipped with dual horns of standard
make with each horn capable of producing complex sound in bands
of audio frequencies between 250 and 2,000 cycles per second and
tested per Society of Automotive Engineers Standard
(b) Air Horn (Optional): Air horn, if required, shall be
dual-horn type under the control of the driver. The control may
be pull-cable type, hand-operated dash-mounted switch, or foot
operated. Air horn shall be mounted to the roof of the bus body
or the chassis frame where it is protected from mud and other
(18) Lamps and Signals
(a) The chassis manufacturer shall equip the front of a
conventional, body-on-chassis bus with headlamps, turn signals,
and side marker lamps (Types A and C).
(b) The bus shall be equipped with at least two dual beam
headlamps of the sealed beam type, with at least one headlamp on
each side of the bus. The headlamps shall be located at a height
of not more than 54 inches or less than 24 inches when measured
vertically from the center of the lamp to the level ground on
which the unloaded bus stands.
(c) The bus shall be equipped with a manually-operated
dimmer switch for use by the driver in selecting either the high
or low beam of the headlights.
(d) Fog lights or driving lights are optional. If
required, they shall have an operating switch that is independent
of the headlight switch.
(19) Instruments and Instrument Panel
(a) Chassis shall be equipped with the following
instruments and gauges. Lights in lieu of gauges are not
acceptable except as noted. Optional instruments and gauges are
identified as such.
(ii) Odometer which will give accrued mileage to seven
digits including tenths of miles.
(A) Voltmeter with graduated scale compatible with the
electrical system (Type A, B, C, and D buses).
(B) Ammeter with graduated charge and discharge with
ammeter and its wiring compatible with generating capacities is
permitted in lieu of voltmeter.
(iv) Oil-pressure gauge.
(v) Water temperature gauge.
(vi) Fuel gauge.
(vii) High beam headlight indicator.
(viii) Brake indicator gauge (vacuum or air) 2-inch
(ix) Light indicator in lieu of gauge permitted on
vehicle equipped with hydraulic-over-hydraulic brake
(x) Glow-plug indicator light where appropriate.
(xi) Tachometer (optional).
(xii) A self-cancelling directional signal switch shall
be provided by the chassis manufacturer. It shall have a hazard
warning switch in combination with the directional signal
(xiii) Turn-signal indicator lights.
(xiv) Service-hour meter is optional on diesel
(xv) Engine warning system for low oil pressure and/or
high engine temperature is optional.
(xvi) Tachograph or on-board computer are
(b) All instruments shall be easily accessible for
maintenance and repair.
(c) Above instruments and gauges shall be full-faced and
shall be mounted on the instrument panel in such a manner that
each is clearly visible to the driver while in normal seated
position. Instruments and gauges may be mounted individually or
in "cluster" fashion. In addition, they may be
independently removable or may be constructed as a solid state
combined panel in which case the entire panel is
(d) Instrument panel shall have lamps of sufficient
candlepower to illuminate all instruments, gauges, and shift
selector indicator for automatic transmission.
(20) Oil Filter
(a) Oil filter of replaceable element type shall be
provided and shall be connected by flexible oil lines if it is
not of built-in or engine-mounted design. Oil filter shall have
capacity of at least one quart.
(a) All openings in floorboard or firewall between
chassis and passenger compartment, such as for gearshift and
parking brake lever, shall be sealed unless they are to be
altered by the bus body manufacturer. All openings between
chassis and passenger compartment made due to alterations by the
bus body manufacturer will be sealed by the bus body
(22) Retarder, Driveline, or Exhaust Brakes
(a) Driveline retarders or exhaust brakes, if used, shall
maintain the speed of the fully loaded school bus at 19.0 mph or
30 km/hr on a 5 per cent grade for 3.5 miles or 6
(23) Shock Absorbers
(a) Bus shall be equipped with front and rear
double-action heavy-duty shock absorbers compatible with
manufacturers' rated axle capacities at each wheel
(a) Capacity of springs or suspension assemblies shall be
commensurate with chassis manufacturers' gross vehicle weight
(b) If rear leaf springs are used, they shall be either
air or progressive type. Front or rear springs may be
(c) Springs or suspension assemblies shall be of ample
resiliency under all load conditions and of adequate strength to
sustain the loaded bus without evidence of overload.
(d) Springs or suspension assemblies shall be designed to
carry their share of the GVW.
(e) If leaf-type springs are used, the front of the main
leaf eye shall be protected by a second leaf wrapper eye (front
and/or rear springs).
(25) Steering Gear
(a) Steering gear shall be approved by chassis
manufacturer and designed to assure safe and accurate performance
when vehicle is operated with maximum load and at maximum speed.
All buses shall be equipped with heavy-duty, truck-type integral
gear hydraulic power steering that shall assure safe and accurate
performance when the fully loaded vehicle is operated at maximum
speed. Hydraulic power steering is required and shall be of the
integral type with integral valves.
(b) If external adjustments are required, steering
mechanism must be accessible to accomplish same.
(c) No changes shall be made in steering apparatus that
are not approved by chassis manufacturer.
(d) There shall be clearance of at least two inches
between steering wheel and cowl, instrument panel, windshield, or
any other surface.
(e) The steering mechanism shall provide for easy
adjustment for lost motion.
(f) The steering system shall be designed to provide
means for lubrication of all wear-points, if wear-points are not
(26) Tires and Wheels
(a) Tires and wheels of proper size and tires with load
rating commensurate with chassis manufacturers' gross vehicle
weight ratings shall be provided.
(b) Dual rear wheels and tires shall be provided on all
(c) All tires on any given vehicle shall be of same size
and load rating. The load range of all tires shall meet or exceed
the gross axle weight rating as required by FMVSS 120.
(d) If vehicle is equipped with a spare tire, the wheel
and tire shall be of the same size and load rating as those
mounted on the vehicle.
(e) If a tire carrier is required, it shall be suitably
mounted in accessible location outside the passenger
(f) All wheels on any given vehicle shall be of same size
and load rating capacity. Wheels shall be steel disc type; cast
or spoke wheels are not permitted.
(27) Tow Hooks
(a) Two front and two rear heavy duty frame mounted tow
hooks shall be furnished on all buses Types B, C, and D. Tow
hooks must be attached so as not to project beyond the front or
rear bumpers. The front tow hooks shall be furnished by the
chassis manufacturer, and the rear tow hooks furnished by the
body manufacturer on Type C buses. Front and rear tow hooks shall
be furnished by the body manufacturer on Types B and D buses. The
installation shall be according to manufacturers'
(a) The input torque capacity of the transmission shall
be at least ten percent greater than the maximum net torque
developed by the engine.
(b) The transmission shall be equipped with an automatic
back-up light switch for the operation of the back-up light
mounted on the rear of the school bus body. The switch will be
wired to the back-up light by the body manufacturer. This switch
is to be activated by moving the gear shift lever into the
(c) Manual Transmission:
(i) Manual transmission shall be of heavy-duty type. For
buses with a capacity of 30 or more passengers, transmission
shall have four speeds forward and one in reverse. For buses with
a capacity of over 30 passengers, transmissions shall have five
speeds forward and one in reverse.
(ii) Manual transmissions shall be synchromesh or
constant-mesh in all gears except first and reverse.
(d) Automatic transmission shall provide for not less
than three forward speeds and one reverse speed. The shift
selector, if applicable, shall provide a detent between each gear
position when the gear selector quadrant and shift selector are
not steering column mounted. (Exception: Type A and B
(29) Turning Radius
(a) Chassis with a wheel base of 264 inches or less shall
have a right and left turning radius of not more than 42.5
(b) Chassis with a wheelbase of 265 inches or more shall
have a right and left turning radius of not more than 44.5
(a) Chassis manufacturer or its agent shall coat
undersides of steel or metallic front fenders with rust-proofing
compound for which compound manufacturers have certified to
chassis builder that compound meets or exceeds all performance
and qualitative requirements of paragraph 3.4 of Federal
Specification TT-C-520B using modified test.
(31) Weight Distribution
(a) Weight distribution of fully-loaded bus on level
surface shall not exceed the manufacturer's front gross axle
rating and rear gross axle rating.
R909-3-6. Body Requirements. (1) Aisle
(a) Minimum clearance of all aisles including aisle to
emergency door(s) shall be 12 inches.
(b) Seat backs shall be slanted sufficiently to give
aisle clearance of 15 inches at tops of seat backs.
(2) Backup Warning Alarm (Optional)
(a) An automatic audible alarm may be installed behind
the rear axle and shall comply with the Society of Automotive
Engineers published Backup Alarm Standards (SAE 994b) specifying
97+-4dsB(A) for rubber tired vehicles.
(a) Battery is to be furnished by chassis
(b) The body manufacturer shall supply a compartment to
securely attach battery on slide-out or swing-out tray in a
closed, vented compartment in the body skirt, whereby battery may
be exposed for convenient servicing. Battery compartment door or
cover shall be hinged at front or top and secured by adequate and
conveniently operated latch or other type fastener. (Exception:
(4) Bumper (Front)
(a) See Chassis Standard, R909-3-5(6).
(5) Bumper (Rear)
(a) Bumper shall be of pressed steel channel or
equivalent material at least 3/16-inch thick and nine inches wide
(high), and of sufficient strength to permit pushing by another
vehicle of the same GVW rating without permanent distortion.
(Exception: Type A bus, minimum 3/16 inch x 8 inch.)
(b) Bumper shall be wrapped around back corners of bus.
It shall extend forward at least 12 inches, measured from
rear-most point of body at floor line.
(c) Bumper shall be attached to chassis frame in such a
manner that it may be easily removed, shall be so braced as to
develop full strength of bumper section from rear or side impact,
and shall be designed to discourage hitching of rides.
(d) Bumper shall extend at least one inch beyond
rear-most part of body surface measured at floor line.
(e) The bumper provided by the chassis manufacturer may
be used on Type A buses.
(a) See "Insulation" and "Interior,"
Body Standards, R909-3-6(18) and (19).
(a) See "Wheelhousing," Body Standards,
(a) The school bus body shall be painted a uniform
National School Bus Yellow. The roof may be painted
(b) The color known as National School Bus Yellow was
designated as such by the 1939 National Conference on School Bus
Standards. The National Bureau of Standards of the U.S.
Department of Commerce assisted in developing this color and its
colorimetric specifications, as follows:
National School Bus Yellow
x y max std min
.5211 .4549 41. 40.
in millicrons P(%)
max std min max std min
584.5 583.5 582.5 93.7 89
(c) At the 1980 Conference, the colors in use were
reviewed. A color standard was selected, slightly different from
the above, and specific tolerances were chosen. These tolerances
will insure a continuity of appearance from bus to bus, and
within the same bus when different elements are finished or
refinished at different times. Specification for the Standard
Color, with light and dark tolerances (Upper and Lower
Reflectance), are shown below in tabular form.
Specifications for Standard Color
For Source C
CIE Chromaticity Reflectance
Coordinates Reflectance Tolerances
x y Y(%) Upper Lower
.5089 .4408 40.14% 41.77% 38.45%
(d) The body exterior paint trim, bumper, lamp hoods,
emergency door arrow, and lettering shall be black.
(a) Construction shall be of prime commercial quality
steel or other metal or material with strength at least
equivalent to all-steel and corrosion resistance at least
equivalent to all-steel as certified by bus body manufacturer
(See Section 54, Metal Treatment). Types B, C, and D buses shall
meet joint strength standards. Type A buses shall meet joint
strength standards for the passenger compartment only as
specified in FMVSS-221.
(b) Construction shall provide a reasonably dustproof and
(c) A certification plate shall be affixed to the inside
of each body in the same area as the body serial number. This
certification plate shall contain the following or similar
wording: "(manufacturer's name) does hereby certify that
(body serial number) has been constructed with standard and/or
optional equipment that meets the Colorado Racking Load Test in
accordance with Utah State School Bus Standards in effect at time
(a) Defrosting and defogging equipment shall direct a
sufficient flow of heated air onto the windshield, the window to
the left of the driver, and the glass in the viewing area
directly to the right of the driver to eliminate frost, fog, and
snow. The defroster unit shall have a separate blower motor in
addition to the heater motors. Defrosting and defogging equipment
for Type A vehicles shall direct a sufficient flow of heated air
onto the windshield to eliminate frost, fog, and snow.
(b) The defrosting system shall conform to Society of
Automotive Engineers Standards J-381 and J-382.
(c) The defroster and defogging system shall be capable
of furnishing heated outside ambient air except that the part of
the system furnishing additional air to the windshield, entrance
door and step-well may be of the recirculating air type.
(d) Auxiliary fans are not to be considered as a
defrosting and defogging system.
(e) Portable heaters may not be used.
(a) Service Door:
(i) The service door shall be either manual or
power-operated under the control of driver and shall be designed
to afford easy release and prevent accidental opening. When hand
lever is used, no part shall come together so as to shear or
crush fingers, and shall have a heavy duty chrome control handle
with lubricated bushings or bearings.
(ii) The service door shall be located on right side of
bus opposite driver and within direct view of driver.
(iii) The service door shall have minimum horizontal
opening of 24 inches and minimum vertical opening of 68
(iv) The service door shall be of split type, sedan type,
or jack-knife type. (Split-type door includes any sectioned door
which divides and opens inward or outward.) If one section of
split-type door opens inward and the other opens outward, front
section shall open outward.
(v) Lower as well as upper panels shall be of approved
safety glass. Bottom of lower glass panel shall not be more than
10 inches from the top surface of the bottom step when bus is
unloaded. Top of upper glass panel shall not be more than six
inches from top of door.
(vi) Vertical closing edges on the entrance door(s) shall
be equipped with flexible material to protect childrens'
fingers from injury.
(vii) All doors shall be equipped with padding at the top
edge of each door opening. Pad shall be at least three inches
wide and one inch thick and extend the full width of the door
(viii) Optional skid plates to protect door step wells
may be installed.
(b) Emergency Doors.
(i) Emergency door shall be hinged on the right side if
the door is in the rear center of the bus and on the front side
if the door is on the left side of the bus. It shall open outward
and shall be labeled inside and outside to indicate how it is to
(ii) Upper portion of emergency door shall be equipped
with approved safety glass, exposed area of which shall be not
less than 400 square inches. The lower portion of the rear center
emergency door shall be equipped with a minimum of 350 square
inches of approved safety glass.
(iii) There shall be no steps leading to emergency
(iv) The words "EMERGENCY DOOR", both inside
and outside in letters at least two inches high, shall be placed
at top of or directly above the emergency door or on the door in
the metal panel above the top glass.
(v) The emergency door shall be equipped with padding at
the top edge of each door opening. Pad shall be at least three
inches wide and one inch thick and extend the full width of the
(vi) The side emergency door, if installed, must meet the
requirements set forth in FMVSS 217, S 188.8.131.52, (b), regardless
of its use with any other combination of emergency
(vii) All emergency doors, exit windows, and push-out
type windows shall be furnished with an audible buzzer to
indicate to the driver that the exit is open. Side exit door must
be furnished with a three-point bar lock.
(viii) Emergency Exit(s).
(A) Each school bus shall be equipped with either (1) an
emergency door located in the center of the rear end or (2) if
the engine or a storage compartment is located in the rear, a
left side emergency door in the rear half of the bus and an
emergency window in the rear end. Double side emergency exits are
(I) The passage to the emergency door shall be kept clear
of obstructions and there shall be no steps leading to the
(II) A left side emergency door shall be equipped with
safety glass in the upper portion. The lower portion shall be at
least the same gauge metal as used in the body.
(III) A positive, mechanical device shall be used that
holds the door open and prevents it from closing during
emergencies and evacuation drills.
(IV) A rear emergency window (used in conjunction with a
left-hand emergency door) shall be at least 16 inches high and 54
inches wide on buses 80 inches or more in total width and at
least 16 inches high and 48 inches wide on buses less than 80
inches in total width.
(V) A rear emergency window shall be hinged from the top,
and designed to prevent accidental reclosing in an emergency. A
header pad that lines the upper length of the window opening
shall be furnished.
(VI) Paneling of sufficient strength to support the
weight of an occupant shall cover the space between the top of
the rear davenport seat and the inside lower ledge of the rear
(VII) Emergency doors shall be designed to be opened from
either the inside or outside of the bus and shall be equipped
with a fastening device which may be quickly released but is
designed to offer protection against accidental release. Control
from the driver's seat is not permitted. Provisions for
opening from the outside shall consist of a nondetachable device
designed to prevent hitching-to, but to permit opening when
necessary. There shall be no exterior body projections that could
injure pupils exiting through the emergency window or door other
than the proper opening controls.
(VIII) If the latch handle on the outside of the
emergency door is not located on the outer edge of the door, a
door pull shall be affixed in the extreme left-hand location at
the bottom to prevent hitching-on. The emergency pull shall be
constructed of heavy metal and shall be free from any sharp edges
likely to cause injury.
(IX) Emergency doors shall be equipped with a slide-bar,
cam-operated lock. Slide bar shall have minimum stroke of one
inch. The door lock shall be equipped with an interior handle
that extends approximately to the center of the emergency door.
The handle shall lift up to release the lock. The latch handle
shall be protected by a metal guard of adequate width to prevent
the handle from being actuated by a child falling against the
door, but shall have sufficient clearance above the latch handle
to permit easy grasp of the handle. The handle shall be of
sufficient length to permit a small child to open the
(X) Emergency door lock shall be equipped with suitable
electric plunger-switch connected with a buzzer located in the
driver's compartment. Switch shall be enclosed in a metal
case, and wires leading from switch shall be concealed in the bus
body. Switch shall be so installed that the plunger contacts the
outer edge of slide bar in such a manner that any movement of
slide bar will immediately close circuit on the switch and
activate the buzzer.
(XI) Rear emergency windows shall be equipped with a
latch or latches on the inside designed for quick release, but
offering protection against accidental release. Windows shall
also be equipped with a latching mechanism that can be actuated
from the outside. The outside release shall be nondetachable and
be designed to prevent hitching-to.
(XII) The window latch shall be equipped to activate the
electric buzzer when the latch is released.
(XIII) Emergency doors, hatches, or windows shall be
installed, constructed, and identified as prescribed in FMVSS
217. Roof hatches are optional and must be equivalent in quality
to the Transpec Triple Value model. Push-out windows are
(XIV) There shall be a head bumper pad installed on the
inside of the top of the emergency doors. This pad shall be
approximately three inches in width and one inch thick and shall
extend across the entire top of the door opening.
(12) Fire Extinguishers
(a) The bus shall be equipped with at least one
pressurized, dry chemical type fire extinguisher complete with
hose, approved by Underwriters Laboratories. Extinguisher must be
mounted in a bracket located in the driver's compartment and
must be readily accessible to the driver and passengers. A
pressure gauge shall be mounted on the extinguisher so as to be
easily read without moving the extinguisher from its mounted
(b) The fire extinguisher shall be rated at 3A40BC or
greater. The operating mechanism shall be sealed with a type of
seal that will not interfere with the use of the fire
(13) First Aid and Body Fluid Clean-up Kits
(a) The bus shall have a first-aid kit in a removable,
moisture and dustproof metal container mounted in an accessible
place within driver's compartment. This place shall be marked
to indicate its location.
(i) Minimum contents are as follows:
(A) 2 - 1" x 2-1/2 yards adhesive tape
(B) 24 - sterile gauze pads 3" x 3"
(C) 100 - 3/4" x 3" adhesive bandages
(D) 8 - 2" bandage compress
(E) 10 - 3" bandage compress
(F) 2 - 3" x 6 yards sterile gauze roller
(G) 2 - nonsterile triangular bandages approximately
40" x 36" x 54" with 2 safety pins
(H) 3 - sterile gauze pads 36" x 36"
(I) 3 - sterile eye pads
(J) 1 - blunt-end scissors
(K) 1 - pair latex gloves
(L) 1 - mouth-to-mouth airway
(b) In addition to the first aid kit, all buses shall
have a body fluid clean-up kit in a metal container properly
labeled and mounted.
(i) Minimum contents are:
(A) Full sized polyethylene apron
(B) Surgical face mask
(C) Protective goggles
(D) 1 pair latex gloves
(E) Absorption matter (4 ounces.)
(F) 2 biohazard disposal bags (at least one red in
(G) Antibacterial disenfectant in crystal, liquid or
powder form (2 ounces), or in towlette form.
(H) 2 large paper towels
(I) Clean-up spatula, plastic or cardboard
(c) Plastic clean-up kit containers purchased prior to
the adoption of this edition of the Standards are acceptable.
Containers purchased following adoption of this edition must be
(a) Floor in underseat area, including tops of
wheelhousings, driver's compartment, and toeboard, shall be
covered with smooth rubber floor covering or equivalent having
minimum overall thickness of .125 inch.
(b) Floor covering in aisle shall be of aisle-type rubber
or equivalent, wear-resistant, and ribbed. Minimum overall
thickness shall be .187 inch measured from tops of ribs. Floor
covering in driver's compartment may be ribbed.
(c) Floor covering must be permanently bonded to floor
and must not crack when subjected to sudden changes in
temperature. Bonding or adhesive material shall be waterproof and
shall be of type recommended by manufacturer of floor-covering
material. All seams must be sealed with waterproof sealer and
covered with a metal strip.
(d) Metal cove moldings shall be furnished along all
floor to sidewall areas, and rear floor to sidewall areas
(a) Heaters shall be of hot-water type.
(b) If only one heater is used, it shall be of fresh air
or combination fresh air and recirculating type.
(c) If more than one heater is used, additional heaters
may be of recirculating air type.
(d) The heating system shall be capable of maintaining
throughout the bus a temperature of not less than 40 degrees
Fahrenheit at the average minimum January temperature as
established by the U.S. Department of Commerce, Weather Bureau,
for the area in which the vehicle is to be operated.
(e) All heaters installed by body manufacturers shall
bear a name plate that shall indicate the heater rating in
accordance with SBMI Code 001. Said plate, to be affixed by the
heater manufacturer, shall constitute certification that the
heater performance is as specified in the SBMI Code cited
(f) Heater hoses shall be adequately supported to guard
against excessive wear due to vibration. The hoses shall not
dangle or rub against the chassis or sharp edges and shall not
interfere with or restrict the operation of any engine function.
Heater hose shall conform to SAE J20c. Heater lines on the
interior of bus shall be shielded to prevent scalding of the
driver or passengers.
(g) Each hot water system installed by a body
manufacturer shall include a shutoff valve installed in the
pressure and return lines at or near the engine in an accessible
(h) There shall be a water flow regulating valve
installed in the pressure line for convenient operation by the
(i) Accessible bleeder valves shall be installed in an
appropriate place in the return lines of body company-installed
heaters to remove air from the heater lines.
(j) Heater motors, cores, and fans must be readily
accessible for service. Access panels shall be provided as
(k) The body company shall furnish permanent type
ethylene-glycol base antifreeze that will provide for protection
to the cooling and heating system to at least 40 degrees below
(l) An auxiliary heater booster water pump shall be
furnished by the body company on all Type C and D buses. It shall
be driven by a 12-volt electric motor and have a minimum flow
capacity of 12 gallons per minute with three feet at head
(m) Auxiliary fuel-fired heaters are optional. If used,
they must conform to FMVSS 301, Standards for Fuel System
(a) The body shall bear the words "SCHOOL BUS"
in black letters at least eight inches high, one inch line width,
both front and rear of body. The lettering shall be located
between the warning signal lamps as high as possible without
impairment of its visibility. Lettering shall conform to
"Series B" of Standard Alphabets for highway signs.
There shall be no other lettering on the front or rear of the bus
except for the emergency door identification.
(b) The name of the school district, independent school,
or transportation company shall be placed on each side of the bus
body. The name shall be in black letters, approximately six
inches in height and proportionately spaced to achieve a balanced
(c) On bodies of school buses leased to a school board by
private owners, the name of the owner followed by the word
"OWNER" shall be in black letters, approximately six
inches in height and proportionately spaced to achieve a balanced
(d) The manufacturer's rated pupil seating capacity
shall be shown in two-inch letters, either painted on or in decal
form, on the inside upper portion of the entrance door or inside
the body above the right hand windshield.
(e) The numbering of individual buses for identification
purposes is permissible. Numerals shall be black and six inches
in height. The location of the numbers shall be:
(i) Right side--at district identification belt line aft
(ii) Rear of the vehicle--curb side below tail
(iii) Driver panel--belt line on the left side.
(iv) One additional position that is optional with
(f) Lettering and numbering as described above are the
only permissible permanent markings. Bumper stickers, decals, or
commercial markings are not permitted.
(17) Inside Height
(a) Inside body height shall be 72 inches or more,
measured metal to metal, at any point on longitudinal center line
from front vertical bow to rear vertical bow.
(a) Ceiling and walls shall be insulated with proper
material to deaden sound and to reduce vibration to a
(b) Thermal insulation is required and shall be of
fire-resistant material approved by Underwriters Laboratories,
Inc. The material shall be fiberglass batt type or equal with a
minimum thickness of 1.5 inches. It shall be installed in the
entire roof area, entire body sides, front and rear bulkheads,
and rear area walls.
(c) Floor insulation is optional. If required, it must be
five-ply at least one-half inch thick and/or it shall equal or
exceed properties of exterior-type softwood plywood, CD grade as
specified in standard issued by U.S. Department of
(a) Interior of bus shall be free of all unnecessary
projections likely to cause injury. This standard requires inner
lining on ceilings and walls. If ceiling is constructed so as to
contain lapped joints, forward panel shall be lapped by rear
panel and exposed edges shall be beaded, hemmed, flanged, or
otherwise treated to eliminate sharp edges.
(b) The driver's area forward of the foremost padded
barriers will permit the mounting of required safety equipment
and vehicle operating equipment.
(c) Every school bus shall be constructed so that the
noise level taken at the ear of the occupant nearest to the
primary vehicle noise source shall not exceed 85 dB(A).
(d) Interior side panels from the passenger side window
line to the seat mounting ledge shall be mar-resist, aluminized
steel, textured panels, stainless steel, or equal non-painted
surface to minimize vandalism.
(e) Perforated acoustic interior ceiling panels are
(20) Lamps and Signals
(a) Interior lamps shall be provided that adequately
illuminate aisle and stepwell. Stepwell light shall be connected
to the automatic door control switch for its operation.
(b) Body instrument panel lights shall be controlled by
an independent rheostat switch or may be in combination with
headlight rheostat switch.
(c) School Bus Alternately Flashing Signal
(i) Definition: School bus red signal lamps are
alternately flashing lamps mounted horizontally both front and
rear, intended to identify a vehicle as a school bus and to
inform others that such vehicle is stopped to take on or
discharge school children.
(ii) School bus amber signal lamps are alternately
flashing lamps mounted horizontally both front and rear, intended
to identify a vehicle as a school bus and to inform others that
such vehicle is about to stop to take on or discharge school
(A) Bus shall be equipped with two red lamps at rear of
vehicle and two red lamps at front of vehicle.
(B) In addition to four red lamps described in A above,
four amber lamps shall be installed as follows: One amber lamp
shall be located near each red signal lamp, at same level, but
closer to vertical centerline of bus. Red and amber signal lamps
shall be wired so that amber lamps are activated manually, and
red lamps are automatically activated (with amber lamps being
automatically cancelled) when bus service door is
(C) A master switch is required for the warning light
(D) The amber warning signal lamps shall be activated
manually by a switch mounted on the driver control panel. The red
warning signal lamps shall be automatically activated and the
operation of the amber lamps cancelled when the bus door is
opened. The red warning lamps shall be automatically activated
any time the door is opened, irrespective of whether the amber
warning lamps were activated immediately preceding the door
(E) The alternately flashing warning signal lamp system
shall include an amber and red pilot indicator lamps located
within the easy view of the driver that will indicate when the
amber or red flashing lamps are operating.
(F) The area around the lens of each alternately flashing
signal lamp and extending outward approximately three inches
shall be painted black. Where there is no flat vertical area of
body immediately surrounding the entire lens of lamps, a circular
or square band of black approximately three inches wide,
immediately below and to both sides of lens, shall be painted on
body or roof area to fit the shape of hoods/visors and roofcap.
Individual hood/visor is required for each light and shall be
painted totally black.
(G) A single visor/hood for each set of dual lamps or an
individual visor/hood for each lamp shall be provided. The
visor/hoods shall fit the shape of the lights and roofcaps, be a
minimum depth of 5 inches, and be painted black.
(H) All flashers for alternately flashing red and amber
signal lamps shall be enclosed in the body in a readily
(I) A monitor light for the front and rear lamps of the
school bus is optional. If used, the monitor shall be mounted in
full view of the driver. If the full circuit current passes
through the monitor, each circuit shall be protected by a fuse or
circuit breaker protecting against any short circuit or
(d) Turn Signals.
(i) Bus body shall be equipped with two rear amber
arrow-type turn signal lamps, each with a face of at least 38
square inches, and meet specifications of the Society of
(ii) The bus body shall be equipped with two amber arrow
turn signal lamps, each with a face of at least 38 square inches
on the front of the bus body. These are required on Type B and D
buses. They are also required on Type C buses in addition to
fender mounted chassis directional lamps. Type A buses shall be
(iii) Two side directional signal lights of 32
candlepower shall be located in the beltline near the front of
the bus body. (Exception: Type A)
(iv) Two one-half inch directional pilot lights shall be
provided that indicate to the driver that either the left or
right directional flashers or the hazard warning flashers are
activated. These pilots shall be green in color and bright enough
that they can be seen in operation in bright sunlight. They shall
be located on the dash or bulkhead above the driver.
(v) All directional signal lamps must be connected to the
chassis hazard warning switch to cause simultaneous flashing of
turn signal lamps when needed as vehicular traffic hazard
(vi) Turn signal lamps are to be placed as wide apart as
practical and in plain sight of traffic approaching from front or
(e) Stop and Tail Lights.
(i) The bus shall be equipped with four combination stop
and tail lamps mounted on the rear of the body. Two shall be a
minimum diameter of seven inches and the other two shall be a
minimum of four inches in diameter. The lens color shall be red.
The light emitted from the lamps shall be plainly visible for the
distance of 500 feet to the rear. The tail lights will be
operated by the headlamp switch and the brake lights by the brake
light switch. No lettering is permitted on these lamps except for
(ii) The bottoms of the four-inch diameter stop/tail
lights shall emit white light downward to illuminate the rear
license plate and bus identification number from a distance of
not less than 60 feet in periods of darkness.
(iii) Stop lights and tail lights shall be placed as wide
apart as practical and in plain sight of traffic approaching from
(f) Back Up Lights.
(i) Two four-inch diameter back up lights shall be
provided and shall be of sufficient intensity to inform vehicle
operators and pedestrians that the school bus is in reverse. The
back up lights shall be automatically illuminated when the
ignition switch is "on" and the reverse gear is
engaged. The chassis manufacturer shall provide the switch for
operation of back up lights.
(g) Clearance Marker Lights.
(i) The bus body shall be equipped with clearance lights
on each corner of the bus body, mounted as high as possible on
the permanent structure of the bus in such a manner as to
indicate the extreme width of the body, and a cluster of three
identification lights on the top roof edge of both front and rear
ends of the body located at the body's highest point. Side
marker lights shall be installed midway between the front and
rear clearance lights.
(ii) The lights on the front and sides shall be amber and
the rear lights shall be red.
(h) Reflex Reflectors.
(i) The bus body shall be equipped with four side-mounted
and two rear-mounted reflex reflectors. Light lenses do not
suffice as reflectors.
(ii) Reflectors shall be mounted at a height of not less
than 15 inches nor more than 60 inches above the ground.
(iii) The front side reflectors shall be amber. The right
front side reflector shall be located immediately aft of the
door, and the other front side reflector shall be located at a
similar position on the left side.
(iv) The rear reflectors (side and rear) shall be red.
The two on the sides (one on each side) shall be located as far
to the rear as possible, and the two on the rear as far apart as
(v) All buses shall be equipped with two additional amber
reflectors which shall be located at or near the midpoint between
the front and rear side reflectors.
(vi) Lights and reflectors at or below the bottom window
line shall have rounded protective shields or shall be finished
in such a manner that sharp edges do not protrude or snag
(i) Warning Device.
(i) Each school bus shall contain at least three
reflectorized triangle road warning devices that comply with
FMVSS 125, mounted in an accessible place in the driver's
compartment in a container. The mounting location in Type A
vehicles is optional.
(21) Metal Treatment
(a) All metal 12 gauge and thinner used in construction
of bus body shall be zinc or aluminum coated or treated by
equivalent process before bus is constructed. Included are such
items as structural members, inside and outside panels, door
panels, and floor sills. Excluded are such items as door handles,
grab handles, interior decorative parts, and other interior
(b) All metal parts that will be painted shall be (in
addition to above requirements) chemically cleaned, etched,
zinc/phosphate coated, and zinc/chromate or epoxy primed or
conditioned by equivalent process.
(c) In providing for these requirements, particular
attention shall be given lapped surfaces, welded connections of
structural members, cut edges, punched or drilled hole areas in
sheet metal, closed or box sections, unvented or undrained areas,
and surfaces subjected to abrasion during vehicle
(d) As evidence that above requirements have been met,
samples of materials and sections used in construction of bus
body, when subjected to 1000-hour salt spray test as provided for
in latest revision of ASTM designation; 8-117 "Standard
Method of Salt Spray (Fog) Testing," shall not lose more
than ten percent of material by weight.
(a) Interior Mirror: Interior mirror shall be either
clear view laminated glass or clear view glass bonded to a
backing that retains the glass in the event of breakage. Mirror
shall have rounded corners and protected edges. Type A and Type B
cutaway buses shall have a minimum of a 6 inch x 16 inch mirror
and Type B, C, and D buses shall have a minimum of a 6 inch x 30
(b) Exterior Mirrors: Each bus shall have a minimum of
one exterior left side and one exterior right side rearview
mirror that comply with FMVSS 111. Type A vehicles may be
manufacturer's standard. All exterior rearview mirrors must
be adjustable to allow any driver to have visibility aft of the
rear wheels at ground level.
(c) Indirect Visibility: Each bus shall have a mirror
system that will provide an unobstructed field of view of the
area around the bus and that conforms with FMVSS 111 as amended
December 2, 1993.
(23) Bus Body Mounting
(a) Chassis frame shall support rear body cross member.
Bus body shall be attached to chassis frame at each main floor
sill, except where chassis components interfere, in such manner
as to prevent shifting or separation of body from chassis under
severe operating conditions.
(b) Insulating material shall be placed at all contact
points between body and chassis frame on Type B, C, and D buses,
and shall be so attached to chassis frame or body that it will
not move under severe operating conditions.
(24) Mud flaps
(a) All buses shall be provided with mud flaps or mud
shields at all front and rear wheel positions to prevent mud,
slush, and gravel from being thrown onto the lower sections of
the bus and service entrance area. Mud flaps must be heavy duty
(25) Rubber fenders
(a) Cove-style rubber fenders shall be furnished on Type
D buses on both the front and rear wheelhousing rims to prevent
mud, slush, and water from being thrown onto the sides of the
bus. Cove-style rubber fenders shall be furnished on the rear
wheelhousing rims on Type C buses. Rubber fenders are not
required on Type A and B buses.
(26) Overall Length and Width
(a) Overall length of bus shall not exceed forty feet.
Overall width of bus shall not exceed 102 inches excluding
(27) Rub Rails
(a) Both sides of the vehicle shall have four rubrails.
They shall be located at the window line, seat line, floor line,
and bottom of the body skirt.
(b) The window-line rubrail shall extend from the rear of
the service door opening along the right side of the body,
extending around the right rear corner to the emergency door, and
on the left side from the point of beginning of the passenger
compartment along the left side extending around the left rear
corner to the emergency door.
(c) The seat-line rubrail shall cover the same
longitudinal area as the window line rubrail.
(d) The floor-line rubrail shall cover the same
longitudinal area as the window-line rubrail except at
wheelhousings, extending around the radii of the right and left
rear corners as far as possible.
(e) The skirt-line rubrail shall cover the same
longitudinal area as the window-line rubrail, except that it
shall terminate at the rear corners of the vehicle.
(f) The window-line, seat-line, and floor-line rubrails
shall be attached to the outside of the body at each body post
and to all other vertical structural members.
(g) The skirt-line rubrail shall be attached to the
outside of the body panels and other structural members behind
the body panels.
(h) All rubrails shall be four inches or more in width in
their finished form and shall be of 16 gauge steel or suitable
material of equivalent strength. They shall be constructed in
corrugated or ribbed fashion.
(i) Pressed-in or snap-on rub rails are not
(j) Exception: Rub rails will not extend around rear
corners of buses using rear center luggage compartment or Type D
buses with rear engine, and must accommodate side emergency
(28) Seat Belt for Driver
(a) A Type 2 lap belt/shoulder harness restraint system
shall be provided for the driver. The assembly shall be equipped
with an emergency locking retractor (ELR) for the continuous-belt
system. The lap portion of the belt shall be guided or anchored
where practical to prevent the driver from sliding sideways under
(29) Driver's Seat
(a) The driver's seat must be a high-back, six (6)
way adjustable without the use of tools. It shall adjust forward
and backward, be mounted to adjust upward and downward, with a
tiltback that allows the back to tilt forward and rearward.
(Exception: Type A and Type B Cutaway chassis manufacturers'
(b) Air-ride and lumbar-support are approved optional
(30) Seats and Crash Barriers
(a) All seats shall have minimum depth of 15
(b) In determining seating capacity of bus, allowable
average rump width shall be:
(i) 13 inches where 3-3 seating plan is used.
(ii) 15 inches where 3-2 seating plan is used.
(c) Seat, seat back cushion, and crash barrier shall be
covered with a material having 42-ounce finished weight, 54
inches width and finished vinyl coating of 1.06 broken twill, or
other material with equal tensile strength, tear strength, seam
strength, adhesion strength, resistance to abrasion, resistance
to cold and flex separation.
(d) Each seat leg shall be secured to the floor by a
minimum of two bolts, washers and nuts or flange-headed
(e) All seat frames shall be fastened to the seat rail
with two bolts, washers and nuts or flange-headed bolts.
(f) Type A buses shall have crash barriers.
(31) Steering Wheel
(a) 18" or 20" steering wheel as specified in
the 1994 purchase specification guidelines on file with the Utah
State Board of Education.
(a) The first step at service door shall be not less than
12 inches and not more than 16 inches from ground, based on
standard chassis specifications.
(b) Service door entrance may be equipped with two-step
or three-step stepwell. Risers in each case shall be
approximately equal. When plywood floor is used on steel,
differential may be increased by thickness of plywood used.
Risers shall not exceed 10 inches.
(i) When three-step stepwell is specified, the first step
at service door shall be approximately ten to fourteen inches
from the ground when bus is empty, based on standard chassis
(ii) Type D vehicles shall have a three-step stepwell
with the first step at service door twelve to sixteen inches from
(c) Steps shall be enclosed to prevent accumulation of
ice and snow.
(d) Steps shall not protrude beyond side body
(e) Heated rubber steps are optional.
(33) Grab Handle
(a) A grab handle approximately 20 inches in length shall
be provided in an unobstructed location inside doorway on both
left and right sides. Base of grab handle attaching it to the bus
body shall be designed in such a manner that clothing, draw
strings, straps, or buttons cannot catch or hang up at the
(34) Step Treads
(a) All steps, including floor line platform area, shall
be covered with 3/16-inch rubber floor covering or other
materials equal in wear resistance and abrasion resistance to top
(b) Metal back of tread, minimum 24-gauge cold rolled
steel, shall be permanently bonded to ribbed rubber; grooved
design shall be such that said grooves run at a 90-degree angle
to long dimension of step tread.
(c) 3/16-inch ribbed step tread shall have a 1.5 inch
white nosing as integral piece without any joint.
(d) Rubber portion of step treads shall have the
(i) Special compounding for good abrasion resistance and
high coefficient of friction.
(ii) Flexibility so that it can be bent around a .5 inch
mandrel at 130 degrees F. and at 20 degrees F. without breaking,
cracking, or crazing.
(iii) Show a durometer hardness of 85 to 95.
(35) Stirrup Steps
(a) The shall be at least one folding stirrup step or
recessed foothold and suitably located handles on each side of
the front of the body for easy accessibility for cleaning the
windshield and lamps except when windshield and lamps are easily
accessible from the ground. Steps are permitted in or on the
front bumper in lieu of the stirrup steps, if the windshield and
lamps are easily accessible for cleaning from that position.
(Exception: Type A and Type B cutaway.)
(36) Stop Signal Arm
(a) Stop signal arm shall meet the applicable
requirements of FMVSS 131. The arm shall be of an octagonal shape
with white letters and border on a red background, and shall be
of a reflective material meeting U.S. Department of
Transportation FHWA FP-85 Type 2A or Type 3A. Flashing strobe
lights on stop arm shall be connected to the red alternately
flashing signal lamp circuits. The stop signal shall be vacuum,
electric, or air operated. Arm shall be automatically operated
when red warning lights are activated.
(b) The stop signal arm shall be mounted outside the bus
body near the driver on the left side immediately below the
driver's window. One stop signal arm per bus is
(37) Storage Compartment (Optional)
(a) If tools, tire chains and/or tow chains are carried
on the bus, a container of adequate strength and capacity may be
provided. Such storage container may be located either inside or
outside the passenger compartment. If located inside, it shall
have a cover (seat cushion may not serve this purpose) capable of
being securely latched and be fastened to the floor convenient to
either the service or emergency door. Storage racks may not be
installed inside the passenger compartment of the bus.
(38) Sun Shield
(a) An interior adjustable transparent sun shield not
less than 6 inches x 30 inches for Type B, C, and D vehicles, and
not less than 6 inches x 16 inches for Type A vehicles with a
finished, padded edge shall be installed in a position convenient
for use by driver. It shall be fully adjustable. Type A and Type
B cutaway shall be manufacturers' standards.
(a) Exhaust pipe, muffler and tailpipe shall be outside
bus body compartment and attached to chassis.
(b) Tailpipe shall be constructed of a
corrosion-resistant tubing material at least equal in strength
and durability to 16-gauge steel.
(c) Tailpipe may (1) extend beyond rear axle and extend
at least five inches beyond chassis frame and be mounted outside
of chassis frame rail at end point, or (2) extend to, but not
beyond the body limits on the left side of the bus, behind the
driver's compartment, outboard of chassis center line and
shall terminate from chassis centerline as follows:
Type A buses Manufacturers' standards
Type B buses 42.5 inches
Type C and D buses 48.5 inches.
(i) Exception: The exhaust system on vehicles designed
for the transportation of disabled pupils shall be routed to the
left of the right frame rail to allow for the installation of a
lift on the right side of the vehicle.
(d) Exhaust system on gasoline-powered buses shall be
properly insulated from fuel tank connections by a securely
attached metal shield at any point where it is 12 inches or less
from fuel tank or tank connections.
(e) Muffler shall be constructed of corrosion-resistant
(40) Traction Assisting Devices (Optional)
(a) When used, sanders shall:
(i) Be of hopper cartridge-valve type.
(ii) Have metal hopper with all interior surfaces treated
to prevent condensation.
(iii) Be of at least 100-pound (grit) capacity.
(iv) Have cover on filler opening of hopper that screws
into place, sealing unit airtight. Filling to be accomplished
from outside the bus body.
(v) Have discharge tubes extending under fender to front
of each rear wheel.
(vi) Have no-clogging discharge tubes with slush-proof,
non-freezing rubber nozzles.
(vii) Be operated by electric switch with pilot light
mounted on instrument panel.
(viii) Be exclusively driver-controlled.
(ix) Have gauge to indicate hoppers need refilling when
they are down to one-quarter full.
(b) Automatic traction chains may be installed.
(41) Tow Hooks
(a) Two front and two rear heavy-duty frame mounted tow
hooks shall be furnished on all buses Type B, C, and D. Tow hooks
must project beyond the front or rear bumpers. The front tow
hooks shall be furnished by the chassis manufacturer, and the
rear tow hooks furnished by the body manufacturer on Type C
buses. Front and rear tow hooks shall be furnished by the body
manufacturer on Type B and D buses.
(a) Entire underside of bus body, including floor
sections, cross member, and below floor line side panels, shall
be coated with rust-proofing compound for which compound
manufacturer has issued notarized certification of compliance to
bus body builder that compound meets or exceeds all performance
and qualitative requirements of Department of the Army Coating
Compounds TT-C-520b, Paragraph 3.4 (1973), using modified test
procedures* (*Test panels are to be prepared in accordance with
paragraph 4 6.12 of TT-C-520b with modified procedure requiring
that tests be made on a 48-hour air cured film at thickness
recommended by compound manufacturer) for the following
(i) Salt spray resistance--pass test modified to five
percent salt and 1,000 hours.
(ii) Abrasion resistance--pass.
(iii) Fire resistance--pass.
(b) Undercoating compound shall be applied with suitable
airless or conventional spray equipment to recommended film
thickness and shall show no evidence of voids in cured
(a) Auxiliary Fans (Optional)
(i) Auxiliary fans shall be placed in locations where
they can be adjusted to their maximum effectiveness.
(ii) These fans shall be approximately six inches in
diameter and two-speed.
(iii) The blades of the fans shall be covered with a
protective cage. Each of these fans shall be controlled by a
(b) Body shall be equipped with suitable, controlled
ventilating system of sufficient capacity to maintain proper
quantity of air under operating conditions without opening of
windows except in extremely warm weather.
(c) Static-type, non-closable exhaust ventilation shall
be installed in low-pressure area of roof.
(d) Power Roof Vent Fans (Optional)
(i) If power roof vent fans are required they shall be
two-speed electric type with a switch for each fan that is
supplied. The roof fan ventilation opening shall be provided with
an iris-type closing mechanism to provide for shutting off the
air flow in inclement weather.
(a) The wheelhousing opening shall allow for easy tire
removal and service.
(b) The inside height of the wheelhousing above the floor
line shall not exceed 12 inches. All wheelhousings shall be
(c) The wheelhousing shall provide clearance for
installation and use of tire chains on dual power-driving
(d) No part of a raised wheelhousing shall extend into
the emergency door opening.
(a) Glass Quality and Dimensions
(i) The windshield shall be large enough to permit the
driver to see the road clearly and shall be slanted or
"swept back" to reduce glare. It shall be mounted
between front corner posts that provide a minimal obstruction to
the driver's view.
(ii) The glass used in the windshield shall be AS-1
standard. Side windows and all doors shall be at least AS-2
standard, and rear windows shall be at least AS-3 standard. All
windows shall be mounted so the monogram is visible.
(iii) windshield glass shall be tinted or shaded with a
horizontal gradient band gradually decreasing in light
transmission to 35 percent or less at the top of the
(iv) The edges of all glass mounted in a fixed position
shall be held in place by a rubber gasket of such type that
broken glass can be easily removed and replaced.
(v) For ventilation purposes, the driver's window
shall be adjustable and shall be equipped with a positive latch
that is lockable from the inside. The driver's window shall
be of a sliding type.
(A) Exception: Type A and Type B
(vi) The side window latches shall be easy to operate and
capable of holding the sash securely in place in all
(vii) The side windows shall be equipped with sash locks
of such construction that spring tension shall push the latch
into place and hold it securely in place.
(b) Each full side window shall provide unobstructed
emergency opening not less than nine inches nor more than 12
inches high and 22 inches wide, obtained by lowering window. Side
windows, except driver's window, may be tinted.
(c) Push-out type, split-sash windows may be
(46) Windshield Washers
(a) A windshield washer system shall be
(47) Windshield Wipers
(a) A windshield wiping system, two-speed or more, shall
(b) The wipers shall be operated by one or more air or
electric motors of sufficient power to operate wipers. If one
motor is used the wiper shall work in tandem to give full sweep
of windshield. If more than one motor is used, each motor shall
have a separate switch.
(a) All wiring shall conform to current standards of the
Society of Automotive Engineers.
(i) Wiring shall be arranged in circuits as required with
each circuit protected by a fuse or circuit breaker. A system of
color and number coding shall be used.
(ii) Wiring shall be arranged in at least six regular
circuits, as follows:
(A) Head, tail, stop (brake), and instrument panel
(B) Clearance and step-well lamps (step-well lamp shall
be actuated when service door is opened).
(C) Dome lamp.
(D) Ignition and emergency door signal.
(E) Turn signal lamps.
(F) Alternately flashing signal lamps.
(iii) Any of the above combination circuits may be
subdivided into additional independent circuits.
(iv) Whenever heaters and defrosters are used, at least
one additional circuit shall be installed.
(v) The bus body electrical system shall be equipped with
a continuous duty solenoid switch operated by the ignition switch
that cuts off the electrical power to most body circuits such as
heaters, dome lights, etc. when the ignition switch is turned to
the "off" position.
(vi) Whenever possible, all other electrical functions
(such as sanders and electric-type windshield wipers) shall be
provided with independent and properly protected
(vii) Each body circuit shall be coded by number or
letter and color on a diagram of circuits and shall be attached
to the body in readily accessible location.
(c) The entire electrical system of the body shall be
designed for the same voltage as the chassis on which the body is
(d) All wiring shall have an amperage capacity equal to
or exceeding the designed load. All wiring splices are to be done
at accessible locations and noted as splices on wiring
(e) A body wiring diagram of easily readable size shall
be furnished with each bus body or affixed in an area convenient
to the electrical accessory control panel.
(f) Body power wire shall be attached to a special
terminal on the chassis.
(g) All wires passing through metal openings shall be
protected by a grommet or loom.
(h) Wires not enclosed within body shall be fastened
securely at intervals of not more than 18 inches. All joints
shall be soldered or joined by equally effective
(i) A main battery power disconnect switch is
R909-3-7. Vehicles for Transporting Disabled Students. (1) General Requirements
(a) The specifications in this section are intended to be
supplementary to specifications in the chassis and body sections.
In general, buses used for transporting disabled students should
meet the requirements of all preceding sections plus those listed
in this section. Since it is recognized by the entire industry
that the field of transportation for students with disabilities
is characterized by special needs for individual cases and by a
rapidly changing technology for meeting these needs, a flexible,
common-sense approach to the adoption and enforcement of
specifications for these vehicles is prudent.
(b) School buses are defined as vehicles designed to
carry more than ten persons. Vehicles with ten passenger
positions (including the driver) cannot be certified as buses.
For this reason, the classification "Multipurpose Passenger
Vehicle" (MPV) must be used by manufacturers for these
vehicles in lieu of the classification "school bus." In
determining passenger capacity, wheelchair positions are counted
as passenger positions.
(c) The following standards address modifications as they
pertain to school buses that, with standard seating arrangements
prior to modification, would accommodate more than ten persons.
If by addition of a power lift, wheelchair positions, or other
modifications, the capacity is reduced such that vehicles become
MPVs, the intent of these standards is that these vehicles are
required to meet the same standards required prior to such
modifications and such MPVs are included in all references to
school buses and school bus requirements.
(d) School buses designed for transporting children with
special transportation needs shall comply with state Standards
applicable to school buses and to Federal Motor Vehicle Safety
Standards (FMVSS) for their Gross Vehicle Weight Rating (GVWR)
(e) Any school bus that is used for the transportation of
children who are confined to a wheelchair and/or other mobile
positioning device or who require life support equipment that
prohibits their use of the regular service entrance, shall be
equipped with a power lift unless a ramp is needed for unusual
circumstances related to passenger needs.
(a) All school buses equipped with a power lift shall
have aisles leading to the emergency door(s) from wheelchair area
of sufficient width (minimum 30 inches) to permit passage of
maximum size wheelchair.
(a) All school buses should be equipped with an
electronic two-way voice communication system.
(4) Fastening Devices
(a) Occupant securement systems must comply with the
requirements of FMVSS 222.
(b) The following information shall be provided with each
vehicle equipped with a securement system:
(i) Detailed installation instructions and parts
(ii) Detailed instructions and a diagram showing the
proper placement and positioning of the system, including correct
(a) Tinted glass up to 30 percent light transmission may
be installed wherever AS-3 glass is permitted.
(a) Additional heater(s) may be installed in the rear
portion of the bus on or behind wheel wells.
(7) Power lift
(a) Lifting mechanism shall be able to lift minimum pay
load of 800 pounds. A clear opening and platform to accommodate a
30-inch wide wheelchair shall be provided.
(b) When the platform is in the fully up position, it
shall be locked in position mechanically to prevent the lift
platform from falling while in operation due to a power
(c) Controls shall be provided that enable the operator
to activate the lift mechanism from either inside or outside of
the bus. There shall be a means of preventing the lift platform
from falling while in operation due to a power failure.
(d) Power lifts shall be so equipped that they may be
manually raised in the event of power failure of the power lift
(e) Lift travel shall allow the lift platform to rest
securely on the ground.
(f) All edges of the platform shall be designed to
restrain wheelchair and operator's feet from being entangled
during the raising and lowering process.
(g) Platform shall be fitted on both sides and rear with
full width shields that extend above the floor line of the lift
(h) A restraining device shall be affixed to the outer
edge (curb end) of the platform that will prohibit the wheelchair
from rolling off the platform when the lift is in any position
other than fully lowered to ground level.
(i) A self-adjusting, skid resistant plate shall be
installed on the outer edge of the platform to minimize the
incline from the lift platform to the ground level. This plate,
if so designed, may also suffice as the restraining device
described in Subsection 91.08 above. The lift platform must be
(j) A circuit breaker or fuse shall be installed between
power source and lift motor if electrical power is used.
(k) The lift mechanism shall be equipped with adjustable
limit switches or by-pass valves to prevent excessive pressure
from building in the hydraulic system when the platform reaches
the full up position or full down position.
(a) When a power system is not adequate to load and
unload students having special and unique needs, a ramp device
may be installed.
(b) If a ramp is used, it shall be of sufficient strength
and rigidity to support the special device, occupant, and
attendant(s). It shall be equipped with a protective flange on
each longitudinal side to keep the special device on the
(c) Floor of ramp shall be of non-skid
(d) Ramp shall be of such weight that an average-sized
female driver or attendant can lift it, and designed in such a
way (including lifting handles or slots) that the driver or
attendant can put it in place and return it to its storage place
without undue stress.
(9) Regular Service Entrance
(a) In Type C and D buses, there shall be three step
risers of equal height in the entrance well. The first step at
the service door shall be not less than 10 inches and not more
than 14 inches from the ground, based on standard chassis
specifications. Service door of Type D buses shall be 12 to 16
inches from the ground.
(b) Step risers shall not exceed a height of 10 inches.
When plywood is used on a steel floor or step, the riser height
may be increased by the thickness of the plywood.
(c) On power lift-equipped vehicles, step shall be the
full width of the stepwell, excluding the thickness of the doors
in open position.
(d) Steps shall be enclosed to prevent accumulation of
ice or snow.
(e) Steps shall not protrude beyond side body
(f) As an option, an additional fold-out step may be
provided to reduce the distance from the first step to the
(10) Restraining Devices
(a) Seat frames may be equipped with attachments or
devices to which belts, restraining harnesses, or other devices
may be attached. Optional seats with built-in anchors may be
(11) Seating Arrangements
(a) Flexibility in seat spacing to accommodate special
devices shall be permitted due to constantly changing passenger
requirements and shall be consistent with the student
Individualized Education Plan (IEP).
(12) Special Lights
(a) Lights shall be placed inside the bus to sufficiently
illuminate lift area and shall be activated from the lift door
area. In addition an exterior light shall be provided in the
skirt area to illuminate the outside area around the
(13) Special Service Entrance
(a) Bus bodies may have a special service entrance
constructed in the body to accommodate a wheelchair lift for the
loading and unloading of passengers. If such an entrance is
constructed in the bus body, it must conform to the placement
restrictions set forth in FMVSS 217.
(b) The opening, to accommodate the special service
entrance, shall be at any convenient point on the right (curb
side) of the bus and far enough to the rear to prevent the
door(s), when open, from obstructing the right front regular
service door (excluding a regular front service door
(c) The opening may extend below the floor through the
bottom of the body skirt. If such an opening is used,
reinforcements shall be installed at the front and rear of the
floor opening to support the floor and provide the same strength
as other floor openings.
(d) The opening, with doors open, shall be of sufficient
width to allow the passage of wheelchairs. The minimum clear
opening through the door and the lift mechanism shall be 30
inches in width.
(e) A drip molding shall be installed above the opening
to effectively divert water from the entrance.
(f) The entrance shall be of sufficient width and depth
to accommodate various mechanical lifts and related accessories
as well as the lifting platform.
(g) Door posts and headers at the entrance shall be
reinforced sufficiently to provide support and strength
equivalent to the areas of the side of the bus not used for
(14) Special Service Entrance Doors
(a) A single door may be used if the width of the door
opening does not exceed 42 inches. Three point bar lock is
(b) Two doors shall be used if a single door opening
would have to exceed 42 inches.
(c) All doors shall open outwardly.
(d) All doors shall have positive fastening devices to
hold doors in the open position.
(e) All doors shall be weather sealed. Double-door
configurations shall be so constructed that a flange on the
forward door overlaps the edge of the rear door when the doors
(f) If optional power doors are installed, the design
shall permit release of the doors for opening and closing by the
attendant from the platform inside the bus.
(g) When manually operated dual doors are installed, the
rear door shall have at least one point fastening device
connecting it to the header. The forward mounted door shall have
at least three point fastening devices. One shall be to the
header, one to the floor line of the body, and the other shall be
into the rear door. These locking devices shall afford maximum
safety when the doors are in the closed position. The door and
hinge mechanism shall be of a strength that will provide for the
same type of use as that of a standard entrance door.
(h) Lift door materials, panels, and structural strength
shall be equivalent to the conventional service and emergency
doors. Color, rub rails, paneling, lettering, and other exterior
features shall match adjacent sections of the body.
(i) Each door shall have windows set in rubber compatible
within one-inch of the lower line of adjacent sash.
(j) Door(s) shall be equipped with a device that will
activate a flashing one-inch light located in the driver's
compartment when door(s) is not securely closed and ignition is
in "on" position.
(k) Special service entrance doors shall be equipped with
padding at the top edge of the door opening. Pad shall be at
least three inches wide and one inch thick and extend the full
width of the door opening.
(l) A switch shall be installed to prevent the lifting
mechanism from operating when the lift platform door is
(m) Optional portable student support equipment or
special accessories shall be secured at the mounting location to
withstand a pulling force of five times the weight of the item or
shall be retained in an enclosed, latched compartment. Such
special items include:
(i) Belt cutter for use in emergencies. Belt cutter
should be designed to eliminate the possibility of the operator
or others getting cut during its use. It should be stored in a
safe place such as in the first aid kit.
(ii) Crutches, walkers, canes and similar
(iii) Medical support equipment such as oxygen tanks and
R909-3-8. School Buses Equipped to Operate on Compressed
Natural Gas. (1) General Requirements.
(a) All compressed natural gas (CNG) installations shall
meet all applicable federal and state laws, standards, and
requirements, National Fire Protection Association (NFPA)
standards, American Society of Mechanical Engineers (ASME) and
American Society for Testing and Materials (ASTM) codes and
industry safety requirements. In addition, CNG installations
shall meet the requirements set forth in R714-400,
"Compressed and Liquefied Gas Fuel Systems."
(b) All CNG installations shall be made in compliance
with the standards contained in NFPA Pamphlet No. 52.
(c) All devices used in the CNG system that may be
subjected to container pressure shall be designed for the working
pressure within a design safety factor of at least 4 and shall be
plainly marked as such.
(d) A certified mechanic shall inspect all fittings and
attachments at least quarterly for leaks, wear, tightness, or
(e) CNG Tanks.
(i) All tanks shall be fabricated of steel, aluminum, or
composite materials and be certified in accordance with U.S.
Department of Transportation (DOT), Canadian Transport Commission
(CTC), or ASME regulations to a service pressure of not less than
3,000 psi and a test burst pressure minimum of 5,000 psi and
plainly marked with the words "CNG ONLY," and equipped
with a DOT, CTC or ASME certified springload pressure relief
valve plainly marked for discharge psi setting and discharge cfm
(ii) All tanks shall be directly secured to the main
frame in such a manner as to prevent jarring loose, slipping or
rotating, withstanding a static force of eight times the weight
of a fully pressurized tank with a maximum displacement of .5
(f) CNG Fuel Lines and Installation
(i) Fuel lines shall be permanently secured at intervals
of not more than two feet and shall be placed in such a manner as
to minimize the possibility of damage due to vibration, strains,
(ii) Fuel lines passing through structural members shall
be protected by rubber grommets or bulkhead fittings and follow
the main frame channel wherever possible.
(iii) All fuel lines shall be approved stainless steel
with a maximum working pressure of 3,000 psi, a minimum burst
pressure of four times the working pressure, and shall be labeled
as to the working pressure and CNG service.
(iv) An approved lock-off or solenoid valve, with filter,
shall be provided in the fuel line at a point ahead of the inlet
of the natural gas converter, designed to prevent the flow of
fuel to the converter when the engine is not running. This may be
accomplished by (a) an approved mechanical lock-off controlled by
either the engine vacuum or oil pressure, or (b) an approved
electric solenoid controlled by either a vacuum or oil pressure
(g) CNG Valves, Appurtenances, and Connections
(i) All container valves, appurtenances and connections
shall be protected to prevent damage due to accidental contact
with stationary or loose objects, mud or ice and, to the extent
possible, from damage due to vehicular accidents.
(ii) Relief valve discharge shall be directed so that any
gas released will not impinge on the vehicle and so that the
possibility of impingement on adjacent vehicles or persons is
minimized. The vent hose shall be attached in such a manner that
ice hanging on it will not detach it from its mounting.
(iii) Outlets shall be protected by caps, covers, or
other means to keep water or dirt from collecting in the lines,
thus restricting the flow of natural gas.
(iv) Each line and its connectors shall withstand the
pressure caused by the discharge of vapor from a safety device in
fully open position.
(h) Fuel Injection
(i) Gas mixers, fuel injectors and pressure regulators
for CNG shall meet minimum design standards set forth in NFPA
Pamphlet No. 52.
(i) Fueling CNG vehicles
(i) Fueling shall be done by personnel who have been
trained and certified by the fuel supplier.
(ii) No passenger shall be on board during
(iii) Engine must be shut off during fueling.
(iv) No source of ignition shall be permitted within 10
feet of the vehicle being fueled.
(v) Filling level shall not exceed 125 percent of working
(vi) Instructions shall be conspicuously posted at the
R909-3-9. Requirements for Used School Buses. (1) General Requirements.
(a) This part of the Standards for Utah School Buses and
Operations, 1994 Edition sets forth the requirements for used
school buses to be used in Utah whether purchased or leased by
the school district or private school. The modifications
necessary to make a used bus comply with this section of the
Standards can be made either by the seller or the buyer. The
ultimate responsibility for assuring that a used bus complies
with all federal and state standards before the bus is placed in
service is the responsibility of the using district or
(b) Used school buses shall:
(i) comply with the version of the Standards for Utah
School Buses and Operations in effect at the time of purchase of
the bus, and
(ii) comply with the applicable sections of current state
standards. This requirement shall be satisfied irrespective of
whether the bus had previously been used in the State of
(c) If required, glass used in used school buses shall be
replaced to make it comply with current state standards.
R909-3-10. New School Bus Requirements. (1) Procurement and Inspection.
(a) New school bus procurement is outlined
(i) Procurement policies and vehicle specifications need
to be established by local school districts and private
(ii) Prepare procurement specifications. Mail one copy to
State Office of Education, Pupil Transportation Specialist.
Specification for bid shall include all applicable FMVSS and Utah
(iii) Request for bids and specifications sent to
qualified suppliers of school buses.
(iv) Bids received, evaluated, and selection
(v) District issues purchase order.
(vi) Successful bidder provides school bus or
(vii) Before any new school bus is placed into service in
a school district, it shall first be inspected and tested to
verify compliance with the Standards for Utah School Buses and
Operations, 1994 Edition.
(viii) Inspection shall be conducted by the Safety
Inspection Office of the Utah Highway Patrol. On or before
delivery of a new bus, the school district or private school
shall notify the Safety Inspection Office and request a new
vehicle inspection. Such inspection shall be carried out within
30 days of delivery.
(ix) Acceptance testing is conducted by local agency or
with assistance from the Utah Department of Transportation and
the Pupil Transportation Specialist, Utah State Office of
Education, to insure that the school bus complies with all
standards and specifications.
(b) The acceptance test shall include but not be limited
(i) An inventory of required safety features and
equipment specified will be compared with the line ticket as
issued by the manufacturer.
(ii) Functional tests of all lamps and signals, emergency
braking system, horn and other operating systems.
(iii) Power tests.
(iv) Braking test.
R909-3-11. Exemption From or Modification of
Requirements. (1) General Requirements
(a) It is anticipated that to achieve the stated
objectives of these standards, i.e., provide maximum safety
consistent with the economic use of pupil transportation funds
and available school bus technology, quality, reliability,
conformity, and serviceability, it shall be necessary to allow
exemption from the requirements and periodically modify the
requirements. This part of the Standards sets forth the
procedures for obtaining exemptions and modifying the provisions
of the Standards for Utah School Buses and Operations, 1994
(b) An exemption from the requirements of the Standards
may be initiated by a manufacturer or supplier of pupil
transportation equipment or a local school district. The request
shall be written, should include sufficient supporting data to
justify the request for an exemption, and should be submitted to
the Pupil Transportation Specialist, Utah State Office of
(c) All requests for exemptions from the requirements of
the Standards shall be reviewed by a committee consisting of at
least one representative of the Utah State Department of
Transportation, one representative of the Utah State Department
of Public Safety, and such consultants as deemed appropriate. If
necessary, the committee may require that the request be
presented in person.
(d) All requests for exemption from the requirements of
the Standards, together with the recommendations of the review
committee, shall be submitted to the State Office of Education
for its action and transmittal to the Utah Department of
Transportation. Final authority for determining the disposition
of a request is vested with the Utah Department of
(e) Modification Procedures.
(i) An intent to modify the Standards shall be
distributed to certified suppliers and other interested parties
at least thirty (30) days prior to consideration of the
modification by the Utah State Office of Education and the Utah
Department of Transportation.
(ii) After approval of the proposed modification by the
Utah State Office of Education and the Utah Department of
Transportation, the modification shall become effective 90 days
R909-3-12. Appendix 1. (1) Colorado Racking Load Test
(a) A Racking Load Test (University of Colorado, Boulder,
1972) shall be performed to assure adequate shear stiffness and
strength of the bus body. The racking load shall be applied along
a line connecting the most distant points on a transverse cross
section of the bus interior.
(b) The maximum jack load for the two-frame assembly is
determined by the following formula:
j = 2P, where j - maximum jack load for two-frame test
p = DVW - N and p - load/frame
DVW = DF x GVW DVW - dynamic vehicle weight
DF - dynamic factor, not less than 1.5
GVW - gross vehicle weight
N - total number of bus body frames
Thus for a DF = 1.5, a GVW = 22,000 lbf and N-11, the
dynamic vehicle weight is DVW = 33,000 lbf, the 10ad/frame is
P = 3000 lbf and the maximum jack load is j = 6000lbf.
(c) When a complete bus body is rack loaded, the total
load DVW must be distributed uniformly along the bus body. This
may be accomplished by mounting a series of hydraulic jacks along
the length of the bus interior. Seats may be removed to
facilitate jack mounting although removal is not recommended when
upper seat frames are normally attached to the body structure.
The rack load will be considered to be uniformly distributed when
the variation in the hydraulic jack readings is less than 10%. At
maximum load the sum of all jack readings shall equal
R909-3-13. Appendix 2. (1) Power Test
(a) Performance Requirements: The bus shall be so powered
and geared that the completed bus shall be capable of surmounting
a 3.7 percent grade at a speed of twenty miles per hour with a
full passenger load on a continuous pull.
(b) Recommended Procedure:
(i) Measure the weight of the vehicle. Wt = .....
(ii) Determine the time in seconds it takes to accelerate
the bus from 15 to 25 mph on a level roadway. (T = .....
(iii) Perform the following calculations (Where n =
maximum number of passengers):
= Wt ......... + 300 =
= Wt ......... + 150 + 120n =
(C) a = 0.455/T x Wt
(iv) If the "a" from step three is greater than
or equal to 0.037, the bus is adequate. If it is less than .037,
the bus is not adequate.
R909-3-14. Appendix 3. (1) Braking Test
(a) Performance Requirement: The service braking system
shall be designed and constructed such that by the application of
a single control unit, the bus will achieve a deceleration of 14
feet per second from a speed of 20 mph with a pedal effort of not
more than 75 pounds.
(b) Recommended Procedure:
(i) Determine the time it takes to stop the bus from 20
mph (where T = ..... seconds
(ii) If "T" is less than or equal to 2.5
seconds, the bus is adequate. If it is greater than 2.5 seconds,
the bus is not adequate.
(iii) Contact Pupil Transportation Specialist, State Office
of Education, for use of a decelerometer instrument to measure
KEY: school buses, safety
Date of Enactment or Last Substantive Amendment: [
Notice of Continuation: January 5, 2009
Authorizing, and Implemented or Interpreted Law: 41-6a-1304
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