Field-Based Evaluation of Left Turn Behavior Variations at the Individual Driver/Vehicle Level

Left turns are a complicated maneuver at signalized intersections that to accurately model using microscopic (agent-based) simulation requires calibration process that are typically focused on making changes to simulation parameters until field conditions and simulation conditions are comparable. Simulation parameters are often based on hard cut-off points and the definition of zones that, when adjusted, result in a desired driver behavior. This means that, unlike traditional speed input parameters options, defining a distribution for parameters like the critical gap is not an option in common microscopic simulation tools even when gap acceptance behavior is known to be impacted by waiting time, position in the queue, and arguably is likely to be impacted by factors beyond what controlled experiments reveal. Therefore, it is arguably beneficial to incorporate a variation in left turn gap acceptance behavior in agent-based simulations to accurately represent field conditions. This project will contribute to the collective understanding of left turn behavior by monitoring the gap acceptance behavior of individual drivers over time and evaluating the impact that such knowledge can have on the accuracy of agent-based simulations, especially when a probabilistic model that governs gap acceptance are introduced.


  • English


  • Status: Active
  • Funding: $74949
  • 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:

    Chitturi, Madhav

  • Start Date: 20210601
  • Expected Completion Date: 20220831
  • Actual Completion Date: 0
  • USDOT Program: University Transportation Centers

Subject/Index Terms

Filing Info

  • Accession Number: 01772170
  • Record Type: Research project
  • Source Agency: Safety Research Using Simulation University Transportation Center (SaferSim)
  • Contract Numbers: 69A3551747131
  • Files: UTC, RIP
  • Created Date: May 24 2021 11:28AM