Safety and Operational Evaluation of Adaptive Signal Control

The objective of this project is to perform an operational and safety evaluation of three adaptive signal control deployments (Birmingham, Huntsville, and Montgomery) in Alabama. Specifically, the project will document changes in operational performance measures (delay, travel time, number of stops, etc.). The project will comprise detailed analyses of traffic operations at all signalized intersections along the study corridors and unsignalized intersections at major midblock traffic source/sinks (as agreed with the Alabama Department of Transportation) for existing peak-hour traffic conditions and for similar peak-hour conditions after implementation of adaptive control. The analyses will be conducted using the VISSIM traffic-simulation software and travel time runs conducted along the three corridors. In addition, we will conduct a detailed review of the safety performance attributable to the implementation of adaptive signal control. We will compare three years of crash data from these corridors before implementation of adaptive signal control to three years of data we collect after implementation of adaptive signal control. If feasible, crash modification factors will be developed for future use, and the project will investigate the use of the Surrogate Safety Assessment Model to predict the safety impacts of adaptive control.


  • English


  • Status: Active
  • Funding: $585648.00
  • Contract Numbers:


    UTCA #12402

  • Sponsor Organizations:

    Alabama Department of Transportation

    1409 Coliseum Boulevard
    Montgomery, AL  United States  36130-3050
  • Project Managers:

    Jilla, Bob

  • Performing Organizations:

    University of Alabama, Tuscaloosa

    Department of Civil, Construction and Environmental Engineering
    P.O. Box 870205
    Tuscaloosa, AL  United States  35487-0205
  • Principal Investigators:

    Sullivan, Andrew

    Gurupackiam, Saravanan

    Jones, Steven

  • Start Date: 20120101
  • Expected Completion Date: 0
  • Actual Completion Date: 20151231
  • Source Data: RiP Project 29847

Subject/Index Terms

Filing Info

  • Accession Number: 01572178
  • Record Type: Research project
  • Source Agency: University Transportation Center for Alabama
  • Contract Numbers: 23761, UTCA #12402
  • Files: UTC, RIP
  • Created Date: Aug 1 2015 1:30AM