AZ Interstate Median Safety and Crossover Crash Analysis Study

Although the Manual on Uniform Traffic Control Devices (MUTCD) does not require the use of warning lights on channelization devices, the Arizona Department of Transportation (ADOT) has historically required their use on all traffic control devices used at nighttime construction zones. This report documents research done for ADOT on the use of steady-burn warning lights on vertical panels in roadway construction zones. Specific tasks included a review of the requirements and policies of the departments of transportation of other states regarding the use of flashing warning lights on traffic control devices, a review of ADOT’s construction zone requirements, a search for relevant research, reviews of construction zone accident reports and incident logs, and interviews with ADOT field construction staff regarding the past performance of the Ultra Panels (Type III sheeting) with and without steady-burn warning lights.


  • English


  • Status: Completed
  • Funding: $251,760
  • Contract Numbers:


  • Sponsor Organizations:

    Arizona Department of Transportation Research Center

    206 S. 17th Avenue
    ADOT Research Center
    Phoenix, AZ  United States  85007
  • Project Managers:

    Stone, Bill

  • Performing Organizations:

    Volpe National Transportation Systems Center

    Transportation Planning Division
    55 Broadway
    Cambridge, MA  United States  02142-1093
  • Start Date: 20220503
  • Expected Completion Date: 20230630
  • Actual Completion Date: 20230209

Subject/Index Terms

Filing Info

  • Accession Number: 01850657
  • Record Type: Research project
  • Source Agency: Arizona Department of Transportation
  • Contract Numbers: SPR-784
  • Files: RIP, STATEDOT
  • Created Date: Jun 29 2022 4:17PM