Evaluation of Flashing Yellow Arrows (FYA) for Protected/Permissive Left Turn (PPLT) Control

This research seeks to quantify the safety and operational benefits from upgrading the left turn signal control for the permissive state from solid circular green indication to a flashing yellow arrow indication at intersections in the Peoria area. The safety and operational benefits will be assessed using a before-and-after study of traffic crashes, injuries, and traffic conflicts. Differences in the safety and operational measures will be tested for significance using appropriate inferential statistics. As a part of this research a literature review and a driver comprehension survey will also be conducted. The results and findings will be documented in a final report.


    • English


    • Status: Completed
    • Funding: $399154.00
    • Contract Numbers:


    • Sponsor Organizations:

      Illinois Department of Transportation

      2300 S. Dirksen Parkway
      Springfield, IL  United States  62764
    • Performing Organizations:

      Bradley University, Peoria

      Department of Civil Engineering and Construction
      200 Jobst Hall, 1501 W Bradley Avenue
      Peoria, IL  United States  61625
    • Principal Investigators:

      Schattler, Kerrie

    • Start Date: 20101101
    • Expected Completion Date: 0
    • Actual Completion Date: 20151130
    • Source Data: RiP Project 28643

    Subject/Index Terms

    Filing Info

    • Accession Number: 01480020
    • Record Type: Research project
    • Source Agency: Illinois Department of Transportation
    • Contract Numbers: R27-97
    • Files: RiP
    • Created Date: Apr 27 2013 1:01AM