Traffic Signal Plans to Decongest Street Grids

This project will entail synchronizing green phases across neighboring traffic signals to the backward waves that propagate through queues. The goal is to ensure that green phases are displayed only after queues recede on street segments downstream. In this way, traffic movements are not blocked when they receive green signals. Intersections will be added or removed from this coordination scheme as queues expand or contract over a rush. Unlike previous efforts in this realm, the present research will focus on backward signal progression on two-way streets and integrating this backward scheme with other signal-timing strategies used elsewhere in a city. As regards the latter focus, the research team will pursue a strategy in which intersections inside a congested downtown district are synchronized in reverse fashion, while intersections in outlying neighborhoods are coordinated in such ways as to feed traffic to the downtown district at the highest rates feasible.


  • English


  • Status: Active
  • Funding: $65333
  • 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

    National Institute for Congestion Reduction

    University of South Florida
    Tampa, FL  United States  33620
  • Managing Organizations:

    National Institute for Congestion Reduction

    University of South Florida
    Tampa, FL  United States  33620
  • Project Managers:

    Li, Xiaopeng

  • Performing Organizations:

    University of California, Berkeley

    444 Davis Hall
    Berkeley, CA  United States  94720
  • Principal Investigators:

    Cassidy, Michael

  • Start Date: 20200909
  • Expected Completion Date: 20210930
  • Actual Completion Date: 20221028
  • USDOT Program: University Transportation Centers Program

Subject/Index Terms

Filing Info

  • Accession Number: 01835742
  • Record Type: Research project
  • Source Agency: National Institute for Congestion Reduction
  • Contract Numbers: 69A3551947136, 79070-00-C
  • Files: UTC, RIP
  • Created Date: Feb 9 2022 6:22PM