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Assessment and refinement of real-time travel time algorithms for use in practice : final report, October 2008.

File Language:
English


Details

  • Creators:
  • Corporate Creators:
    Portland State University. Department of Civil & Environmental Engineering
  • Subject/TRT Terms:
  • Publication/ Report Number:
    OTREC-RR-08-02
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Portland (Oregon)
  • Edition:
    Final report; Oct. 2008
  • Corporate Publisher:
    Oregon. Dept. of Transportation. ITS Unit
  • Abstract:
    The FHWA has strongly encouraged transportation departments to display travel times on their Dynamic Message Signs (DMS). The Oregon

    Department of Transportation (ODOT) currently displays travel time estimates on three DMSs in the Portland metropolitan area. In the near

    future, ODOT would like to make travel time estimates available over the Internet on tripcheck.com and via 511. The primary goal of this project

    was to determine the best approach for ODOT to use to estimate travel times for use on DMS signs, 511 and tripcheck.com. In addition to

    recommending a methodology, a crucial component of this project was to provide confidence in the estimates provided by the methodology. In the

    course of this project, over 500 ground truth travel time runs were collected on freeways in the Portland metropolitan area. These ground truth

    travel times were used to statistically analyze the performance of travel time estimation algorithms. The project report presents overall error

    analysis in addition to segment-by-segment analysis and recommendations for travel time estimation for all freeways in the Portland area.

  • Format:
    PDF
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:5b897a8119a3ab3281e141f0d9e2b6b3d6792a86369f2c62f6bfa93500d78bd92bdd3d3c622aff81ed3eb3ba0c0c8bbc62614fcf3288a5628b313c457e7e33d8
  • Download URL:
  • File Type:
    Filetype[PDF - 3.00 MB ]
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