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Innovative methods for calculation of freeway travel time using limited data : executive summary report.
  • Published Date:
    2008-08-01
  • Language:
    English
Filetype[PDF-188.93 KB]


Details:
  • Publication/ Report Number:
  • Resource Type:
  • OCLC Number:
    664733595
  • Edition:
    Executive summary report
  • NTL Classification:
    NTL-PLANNING AND POLICY-Travel Demand ; NTL-OPERATIONS AND TRAFFIC CONTROLS-OPERATIONS AND TRAFFIC CONTROLS ;
  • Abstract:
    ODOT’s policy for Dynamic Message Sign

    utilization requires travel time(s) to be displayed as

    a default message. The current method of

    calculating travel time involves a workstation

    operator estimating the travel time based upon

    observation of high-density vehicle detectors.

    With the proliferation of cell phone usage and the

    advent of computer-aided dispatch links from 911

    call centers, incident detection no longer requires a

    high density of vehicle detectors along the highway.

    Therefore, ODOT’s future freeway management

    system deployments (Cleveland, Akron-Canton,

    Dayton-Springfield, and Toledo) will only have a

    limited set of vehicle detectors for data sampling.

    ODOT currently utilizes two different algorithms to

    estimate travel time in its Freeway Management

    Systems for display on Dynamic Message Signs.

    These methods may no longer be accurate with

    limited vehicle detector data. Therefore, innovative

    methods for accurately calculating travel times are

    needed to maintain the message sign policy.

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