Utah Administrative Code
The Utah Administrative Code is the body of all effective administrative rules as compiled and organized by the Division of Administrative Rules (see Subsection 63G-3-102(5); see also Sections 63G-3-701 and 702).
NOTE: For a list of rules that have been made effective since August 1, 2019, please see the codification segue page.
NOTE TO RULEFILING AGENCIES: Use the RTF version for submitting rule changes.
R920. Transportation, Operations, Traffic and Safety.
Rule R920-8. Flashing Light Usage on Highway Construction or Maintenance Vehicles.
As in effect on August 1, 2019
Table of Contents
- R920-8-1. Purpose.
- R920-8-2. Authority.
- R920-8-3. Definitions.
- R920-8-4. Requirements for All Vehicles Engaged in Highway Construction or Maintenance Operations on State Highways.
- R920-8-5. Requirements for All Vehicles Engaged in Highway Construction or Maintenance Operations on Non-State Highways.
- R920-8-6. Visibility.
- R920-8-7. Specific Limitations.
- R920-8-8. Exceptions.
- R920-8-9. Recommended Placement Practice.
- Date of Enactment or Last Substantive Amendment
- Authorizing, Implemented, or Interpreted Law
This rule provides specifications governing the design and use of special flashing lights on vehicles engaged in highway construction and maintenance operations.
This rule is required and authorized by Section 41-6a-1617.
In addition to the terms defined in Section 41-6a-102, the following terms are defined:
(1) "Engaged" means performing tasks for roadway surface and shoulder maintenance or construction purposes.
(2) "Flashing Amber Lighting System" means one or more amber flashing light(s).
(3) "Flashing lights" means bursts of light which are distinguishable and capture attention.
(4) "Headlight, taillight, or brake light flashers" (also known as "wigwags") means a device used to alter or modify the original vehicle manufacturer's electronically controlled lighting system.
(5) "Highway construction and maintenance vehicles" means both on-road and off-road vehicles or equipment.
(6) "360-degree visibility" means the ability to be seen from all angles.
R920-8-4. Requirements for All Vehicles Engaged in Highway Construction or Maintenance Operations on State Highways.
(1)(a) Except as provided under Subsection (1)(b), beginning July 1, 2015, vehicles engaged in highway construction or maintenance operations on state highways that are not protected by traffic control devices compliant to the current Utah Manual on Uniform Traffic Control Devices, must have a flashing amber lighting system with 360-degree visibility.
(b) When the flashing amber lighting system does not provide 360-degree visibility, vehicle hazard lights shall be used in addition to the flashing amber lighting system.
(2) Flashing amber lighting systems may be supplemented with flashing white lights on the front and flashing red lights on the rear that do not alter or modify the original manufacturer's electronically controlled lighting system.
R920-8-5. Requirements for All Vehicles Engaged in Highway Construction or Maintenance Operations on Non-State Highways.
(1) Local jurisdictions will determine the appropriate use of flashing lights on construction or maintenance vehicles engaged in construction or maintenance operations on non-state roadways.
(1) Flashing amber lighting systems shall meet or exceed the Society of Automotive Engineers (SAE) Class I certification.
(2) Flashing lights shall be positioned on the vehicle so as to not interfere with the ability to see standard vehicle lighting.
(a) Operation of flashing lights must be used in conjunction with standard vehicle lighting.
For vehicles engaged in highway construction or maintenance operations, not including the Utah Department of Transportation's Incident Management Team units:
(1) no red light may be visible from the front of a vehicle;
(2) no flashing white light may be visible from the rear of a vehicle;
(3) blue lights are prohibited; and
(4) headlight, taillight, and brake light flashers (wigwags) are prohibited.
(1) When multiple vehicles are engaged in highway construction and maintenance operations, and are concentrated within a small area in a work zone, it is acceptable for those vehicles within the perimeter of vehicles to reduce the intensity or turn off the flashing amber lighting systems and/or supplemental flashing lighting systems to minimize the distractions to motorists and other workers in the work zone.
(2) Delivery vehicles are not required to have a flashing amber lighting system, but must use vehicle hazard lights when entering or exiting a work zone.
Flashing amber lighting systems should be placed as high on the vehicle as reasonably capable of being placed.
flashing lights, highways, construction, maintenance
August 7, 2015
For questions regarding the content or application of rules under Title R920, please contact the promulgating agency (Transportation, Operations, Traffic and Safety). A list of agencies with links to their homepages is available at http://www.utah.gov/government/agencylist.html or from http://www.rules.utah.gov/contact/agencycontacts.htm.