Detailed Analysis of Roadway Users Interactions at Intersections with Flashing Yellow Arrows

Flashing Yellow Arrows (FYA) on left turns have been found to improve the safety of permissive movements. Recently, cities have also started to use FYA on right turns as a way for making the interactions between right-turning vehicles and conflicting pedestrians safer. Certain questions remain unanswered about the use of FYA for permissive movements, e.g., how signal status and transition between phases impact driver behavior? Researchers have explored (and continue to explore) behaviors during signal status transitions. However, methodologies used typically rely on aggregate data or are too broad in scope to isolate and understand the “microscopic-level” reactions of users to signal status changes or infrastructure characteristics. Existing data collection procedures based on radar technology and computer vision make it possible to obtain detailed information about how roadway users interact with each other and the transportation infrastructure. These datasets can be combined with modeling approaches that use agent-based modeling as a foundation to obtain a detailed understanding of what potentially causes behaviors observed in the field. This project will explore using of a combination of radar-based trajectories and driving simulation to answer pressing questions related to the use of FYA for left and right turns.


  • English


  • Status: Completed
  • Funding: $105849
  • Contract Numbers:


  • Sponsor Organizations:

    Office of the Assistant Secretary for Research and Technology

    University Transportation Centers Program
    Department of Transportation
    Washington, DC  United States  20590
  • Managing Organizations:

    University of Iowa, Iowa City

    National Advanced Driving Simulator, 2401 Oakdale Blvd
    Iowa City, IA  United States  52242-5003
  • Performing Organizations:

    University of Wisconsin, Madison

    Department of Civil and Environmental Engineering
    1415 Engineering Drive
    Madison, WI  United States  53706
  • Principal Investigators:

    Noyce, David

  • Start Date: 20190801
  • Expected Completion Date: 20210731
  • Actual Completion Date: 0
  • USDOT Program: University Transportation Centers

Subject/Index Terms

Filing Info

  • Accession Number: 01699805
  • Record Type: Research project
  • Source Agency: Safety Research Using Simulation University Transportation Center (SaferSim)
  • Contract Numbers: 69A3551747131
  • Files: UTC, RIP
  • Created Date: Mar 26 2019 7:54PM