Evolution of Advanced Transit Signal Priority with Gap-Based Signal Recovery Strategy

Transit Signal Priority (TSP) systems are implemented with the goal of reducing travel times for bus passengers and ensuring that buses adhere to schedules. TSP systems encounter trouble when there are multiple bus requests, heavy traffic conditions on cross-streets, or uncertain bus arrival times. In this study, existing logic concepts for TSP strategies will be modified by assuming access to video detection technologies to accurately provide bus and vehicle locations. The effect of these modifications are examined by testing different scenarios in CORSIM on parts of the Austin, Texas downtown network during peak hours. Along with the “Base” scenario, other scenarios are designed to test variations of (1) whether cross-streets are compensated for lost green time and (2) what sort of red truncation logic is used – traditional logic or logic that relies on video technology to gauge traffic conditions. Simulations will include bus occupancy levels to show the effect of switching between commute modes.


    • English


    • Status: Completed
    • Funding: $112499
    • Contract Numbers:


    • Sponsor Organizations:

      Center for Advanced Multimodal Mobility Solutions and Education

      University of North Carolina, Charlotte
      Charlotte, NC  United States  28223

      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 North Carolina, Charlotte

      Department of Civil and Environmental Engineering
      9201 University City Boulevard
      Charlotte, NC  United States  28223-0001
    • Project Managers:

      Fan, Wei

    • Performing Organizations:

      University of Texas at Austin

      Austin, TX  United States  78712
    • Principal Investigators:

      Machemehl, Randy

    • Start Date: 20171001
    • Expected Completion Date: 20190930
    • Actual Completion Date: 20190930

    Subject/Index Terms

    Filing Info

    • Accession Number: 01652818
    • Record Type: Research project
    • Source Agency: Center for Advanced Multimodal Mobility Solutions and Education
    • Contract Numbers: 69A3551747133
    • Files: UTC, RIP
    • Created Date: Dec 3 2017 9:50AM