Highway Traffic Data Sensitivity Analysis

This report is presented in two components. Part I - Highway Traffic Data Sensitivity Analysis in Systems Approach, describes a systems approach used for highway traffic data sensitivity analysis. It examines the input, output, and processes between the input and the output and identifies key factors in the input processes that would affect the output. Part I looks at point estimation error and compares it with ground truth from independent sensors. It divides highway traffic into four phases and selects the most critical one that would affect traffic parameter estimation error. It proposes a new congestion onset detection method, and, it establishes a simple relationship between the upper bound of travel time estimation delay error and sensor density based on the new congestion detection. Part II - Empirical and Analytical Results for Sensitivity to Loop Station Spacing examines the tradeoff in traffic control applications by calculating response time and traveler delay. Specifically, the study investigates how big of an event can be missed and at what cost for a given deployment. Several bottlenecks are examined using real detector data and the effect of detector station spacing is considered. The influence or link assigned to a detector station is examined, with consideration given to different boundary definitions between the links. Costs are presented in terms of time and as a function of spacing.

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  • Corporate Authors:

    University of California, Berkeley

    California PATH Program, Institute of Transportation Studies
    Richmond Field Station, 1357 South 46th Street
    Richmond, CA  United States  94804-4648

    University of California, Berkeley

    Berkeley, CA  United States  94720-1720

    California Department of Transportation

    1120 N Street
    Sacramento, CA  United States  95814
  • Authors:
    • Lu, Xiao-Yun
    • Coifman, Benjamin
  • Publication Date: 2007-1


  • English

Media Info

  • Media Type: Digital/other
  • Features: Appendices; Figures; References; Tables;
  • Pagination: 179p
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01046844
  • Record Type: Publication
  • Source Agency: UC Berkeley Transportation Library
  • Report/Paper Numbers: UCB-ITS-PRR-2007-3
  • Contract Numbers: TO 5320
  • Created Date: Apr 16 2007 2:34PM