A Tool to Evaluate the Safety Effects of Changes in Freeway Traffic Flow

This study describes a tool developed for assessing the changes in traffic safety tendencies resulting from changes in traffic flow. The tool uses data from single inductive loop detectors, converting 30- second observations of volume and occupancy for multiple freeway lanes into traffic flow regimes. Each regime has a specific pattern of crash types determined through nonlinear multivariate analyses of over 1,000 crashes on freeways in Southern California. The analyses showed ways in which differences in variances in speeds and volumes across lanes, as well as central tendencies of speeds and volumes, combine in complex ways to explain crash taxonomy.

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    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, Irvine

    Institute of Transportation Studies
    4000 Anteater Instruction and Research Building
    Irvine, CA  United States  92697

    California Department of Transportation

    1120 N Street
    Sacramento, CA  United States  95814
  • Authors:
    • Golob, Thomas F
    • Recker, Wilfred W
    • Alvarez, Veronica M
  • Publication Date: 2003-6

Language

  • English

Media Info

  • Media Type: Digital/other
  • Pagination: 22 p.
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00961277
  • Record Type: Publication
  • Source Agency: UC Berkeley Transportation Library
  • Report/Paper Numbers: UCB-ITS-PWP-2003-9
  • Files: PATH, CALTRANS, TRIS, ATRI, STATEDOT
  • Created Date: Aug 4 2003 12:00AM