Freeway Management for Optimal Reliability

Improving travel time reliability is at the core of battling traffic congestion. This report summarizes the findings from a multi-institutional effort for analyzing and improving freeway travel time reliability. It first investigates the effect of incidents on freeway segment capacity, enabling the calibration and validation of the emergent travel time distribution for a baseline condition of a freeway facility using the Highway Capacity Manual approach. The report then develops a unified framework for assessing the freeway travel time reliability, and then it proposes a new strategy of controlling the headways of cooperative connected vehicles to improve travel time reliability. It also presents a prototype micro-level simulation application, GTsim, which analyzes freeway network performance under various types of Active Traffic Management (ATM) strategies, including those aiming to improve travel time reliability. Lastly, the report reviews the safety benefits of ATM strategies.


  • English


  • Status: Completed
  • Funding: $248615
  • Contract Numbers:


  • Sponsor Organizations:

    Department of Transportation

    Intelligent Transportation Systems Joint Program Office
    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Managing Organizations:

    Southeastern Transportation Research, Innovation, Development and Education Center (STRIDE)

    University of Florida
    365 Weil Hall
    Gainesville, FL  United States  32611
  • Project Managers:

    Tucker-Thomas, Dawn

  • Performing Organizations:

    North Carolina State University, Raleigh

    Institute for Transportation Research and Education
    Campus Box 8601
    Raleigh, NC  United States  27695-8601

    University of Michigan, Ann Arbor

    Department of Civil and Environmental Engineering
    2350 Hayward
    Ann Arbor, MI  United States  48109-2125

    Georgia Institute of Technology, Atlanta

    School of Civil and Environmental Engineering
    790 Atlantic Drive
    Atlanta, GA  United States  30332-0355

    Auburn University

    Vice President for Research and Economic Development
    310 Samford Hall
    Auburn, AL  United States  36849
  • Principal Investigators:

    Yin, Yafeng

  • Start Date: 20170119
  • Expected Completion Date: 20191130
  • Actual Completion Date: 20200305
  • USDOT Program: University Transportation Centers Program

Subject/Index Terms

Filing Info

  • Accession Number: 01659587
  • Record Type: Research project
  • Source Agency: Southeastern Transportation Research, Innovation, Development and Education Center (STRIDE)
  • Contract Numbers: 69A3551747104
  • Files: UTC, RIP
  • Created Date: Feb 7 2018 2:15PM