Michigan Urban Trunkline Segments Safety Performance Functions (SPFs) Development and Support

This research aims to develop a uniform, consistent approach that can be applied to estimate the safety performance of urban trunkline road segments at the aggregate (i.e., total crash) level, as well as to within specific crash types and crash severity categories. The study results will provide important guidance to allow Michigan Department of Transportation (MDOT) to make informed decisions as to planning and programming decisions for safety projects. The specific study objectives that will be accomplished in order to meet this goal are as follows: (1) Review and summarize previous and existing efforts to generate Safety Performance Function(s). (2) Identify sites for the following urban road segment types from existing Safety Analyst output: a. Urban Trunkline Two-Lane Arterial b. Urban Trunkline Three-Lane Arterials c. Urban Trunkline Four-Lane Undivided d. Urban Trunkline Four-Lane Divided e. Urban Trunkline Five-Lane Arterial f. Urban Trunkline >Four-Lane Undivided g. Urban Trunkline >Four-Lane Divided h. Urban Trunkline >Four-Lane (TWLTL) (3) Develop SPFs for each of the urban road segment types listed above. (4) Define a maintenance cycle and process for updating SPFs. Achievement of these objectives will be a major step forward for MDOT's highway safety planning, design, and evaluation efforts. The proposed work will lead to statistical methods and tools that provide excellent performance while being accessible and understandable to practitioners.


    • English


    • Status: Proposed
    • Contract Numbers:

      2013-0070 Z3


    • Sponsor Organizations:

      Michigan Department of Transportation

      Murray Van Wagoner Building
      425 West Ottawa, P.O. Box 30050
      Lansing, MI  USA  48909
    • Project Managers:

      Kanitz, Dean

    • Performing Organizations:

      Wayne State University

      Civil and Environmental Engineering
      5050 Anthony Wayne Drive
      Detroit, MI  USA  48202
    • Principal Investigators:

      Savolainen, Peter

    • Start Date: 20140301
    • Actual Completion Date: 20160228
    • Source Data: RiP Project 35421

    Subject/Index Terms

    Filing Info

    • Accession Number: 01494647
    • Record Type: Research project
    • Source Agency: Michigan Department of Transportation
    • Contract Numbers: 2013-0070 Z3, OR14-026
    • Files: RiP
    • Created Date: Sep 28 2013 1:00AM