Dilemma Zone Protection on High-Speed Arterials

Driver behavior within the dilemma zone can be a major safety concern at high-speed signalized intersections, especially for heavy trucks. The Nebraska Department of Roads (NDOR) has developed and implemented an actuated advance warning dilemma zone protection system. The system continually monitors traffic at an upstream detector as well as at stop line detectors to predict the onset of the yellow indication and provides information to drivers (via flashing signal heads and a warning sign) regarding whether they should be prepared to stop as they approach a traffic signal. The system has been documented as being effective at improving traffic safety at isolated signalized intersections where the controller operates in the fully actuated mode. NDOR is currently considering the feasibility of deploying these devices on its coordinated arterials. One objective of this research is to develop a traffic microsimulation procedure for testing the feasibility of deploying the NDOR actuated advance warning system on coordinated arterials. The calibrated traffic microsimulation model will be used to test potential locations of the upstream detector, durations of the lead flash (amount of advance warning time provided to drivers before the green ends), and the maximum allowable headway at the upstream detector location. This will help establish the sets of design parameters for which the system will be beneficial on coordinated arterials. The findings will be used to develop guidelines for the application of the actuated advance warning system so that NDOR can make more informed decisions about where to deploy the system.


  • English


  • Status: Completed
  • Funding: $60000.00
  • Contract Numbers:


  • Sponsor Organizations:

    Research and Innovative Technology Administration

    University Transportation Centers Program
    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Performing Organizations:

    University of Nebraska, Lincoln

    Lincoln, NE  United States 
  • Principal Investigators:

    Appiah, Justice

  • Start Date: 20120701
  • Expected Completion Date: 0
  • Actual Completion Date: 20131231
  • Source Data: RiP Project 32778

Subject/Index Terms

Filing Info

  • Accession Number: 01483148
  • Record Type: Research project
  • Source Agency: Mid-America Transportation Center
  • Contract Numbers: DTRT12-G-UTC07
  • Files: UTC, RIP
  • Created Date: Jun 5 2013 1:01AM