NCHRP Implementation Support Program. Implementing A Proposed Macro-Level Safety Planning Analysis Chapter for the Highway Safety Manual

The Highway Safety Manual (HSM) procedures provide robust methods for conducting site-specific safety analyses known as micro-level analyses. Macro-level analysis procedures can be used to incorporate safety prediction into area-wide, long-range transportation system planning, programming, and policy development. The idea of predicting crashes within a given area, such as census tracts or traffic analysis zones (TAZs), allows agencies to identify safety concerns that may not be apparent by examining crash patterns at an intersection or segment scale. This could potentially allow planners to address safety concerns prior to their full materialization. The objectives of NCHRP 17-81, Proposed Macro-Level Safety Planning Analysis Chapter for the Highway Safety Manual, were to develop validated and demonstrated quantitative macro-level safety prediction models. This included a quantitative safety planning chapter for the AASHTO HSM intended for use by transportation practitioners at all levels. The 17-81 report documented State- and MPO-level models using data from 3 MPOs (Richmond, VA, St. Louis, MO, and Chicago, IL) and 2 States (Illinois and Utah). This proposed implementation project would conduct six activities to expand the information available to agencies contemplating using the 17-81 models or in earlier stages of looking for ways to incorporate safety into planning-level decisions: project kickoff workshop, data compilation and integration, data review workshop, model implementation, peer exchange workshop, and final report.


  • English


  • Status: Proposed
  • Funding: $250000
  • Contract Numbers:

    Project 20-44(53)

  • Sponsor Organizations:

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001

    American Association of State Highway and Transportation Officials (AASHTO)

    444 North Capitol Street, NW
    Washington, DC  United States  20001

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Project Managers:

    Zelinski, Patrick

  • Start Date: 20231011
  • Expected Completion Date: 0
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01887818
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 20-44(53)
  • Files: TRB, RIP
  • Created Date: Jul 17 2023 11:37PM