Understanding Factors Affecting Arterial Reliability Performance Metrics

With worsening congestion, travel time reliability is increasingly becoming as critical as average travel times in affecting travel choices. This research project will first study the data requirements for existing travel time reliability metrics being used or being considered for use by practitioners and researchers. The research team will then use bluetooth travel time data from arterial corridors in Portland to get an understanding of the temporal variation in travel time reliability metrics, travel time distributions, distribution of the travel time reliability metrics, variation of travel time reliability metrics with weather and other special events. The project is particularly interested in understanding if the reliability metrics are similar or different across various arterial corridors. The research team will then adopt a regression approach to quantify the impact of geometry, signal timing, volume counts, weather etc. on travel time reliability. This research project is unique due to the following aspects. The project is studying travel time reliability metrics on arterial corridors with signalized intersections, bicycle, pedestrians, and transit corridors, and not on freeways. The project is attempting to quantify and rank the impact of geometric, traffic flow characteristics on travel time reliability in a formal statistical framework. The project will be basing it's work on archived bluetooth real world travel time data and not use a simulation based framework.


  • English


  • Status: Active
  • Contract Numbers:

    NITC 1117

  • Sponsor Organizations:

    Office of the Assistant Secretary for Research and Technology

    University Transportation Centers Program
    Department of Transportation
    Washington, DC  United States  20590

    Oregon Department of Transportation

    555 13th Street NE
    Salem, OR  United States  97301
  • Managing Organizations:

    TREC at Portland State University

    1900 SW Fourth Ave, Suite 175
    P.O. Box 751
    Portland, Oregon  United States  97201
  • Project Managers:

    Hagedorn, Hau

  • Performing Organizations:

    Portland State University

    Department of Civil and Environmental Engineering
    Engineering Bldg, 301D, 1930 SW 4th Ave.
    Portland, OR  United States  97201
  • Principal Investigators:

    Unnikrishnan, Avinash

    Kothuri, Sirisha

  • Start Date: 20170901
  • Expected Completion Date: 20181231
  • Actual Completion Date: 0
  • USDOT Program: University Transportation Centers Program

Subject/Index Terms

Filing Info

  • Accession Number: 01641373
  • Record Type: Research project
  • Source Agency: National Institute for Transportation and Communities
  • Contract Numbers: NITC 1117
  • Files: UTC, RiP
  • Created Date: Jul 20 2017 7:38PM