Incorporating Safe System Approach into the NCHRP 500 Series

NCHRP Report 500: Guidance for Implementation of the AASHTO Strategic Highway Safety Plan identifies proven, tried, and experimental safety strategies for each of the emphasis areas in AASHTO’s original 1998 Strategic Highway Safety Plan. FHWA and the state departments of transportation (DOTs) partnered through a pooled fund study to develop reliable estimates of the effectiveness of the safety improvements identified as strategies in the NCHRP Report 500 guidebooks. While information presented in the NCHRP 500 series guides is still useful and referenced in many national reports, a lot has changed over the last 20 plus years. In 2010, AASHTO published the Highway Safety Manual. In 2014, AASHTO adopted Toward Zero Deaths: A National Strategy on Highway Safety and in 2018 the National Safety Council published a Road to Zero: A Vision to Achieve Zero Deaths by 2050. Technology is advancing at a rapid pace and has the potential to change traffic safety. Many agencies are beginning to implement a Safe System Approach. There is an opportunity to update these guides and provide guidance to agencies on safety strategies and countermeasures of the future. The objective of this research is to update the guides to align with AASHTO’s current priorities and Safe System principles, as well as reflect on the most recent research and identify new innovations to help achieve the goal of zero deaths on the nation’s roads. The research will help analysts consider a broader list of countermeasures applicable to the majority of crash types; improve the efficiency of countermeasure selection; link to state analysis tools; enhance usability of the NCHRP 500 guidebooks; provide access to the most current information; advance implementation of the Safe System approach; and increase awareness of a valuable tool for implementing safety projects.


  • English


  • Status: Proposed
  • Funding: $700000
  • Contract Numbers:

    Project 17-113

  • 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:

    Retting, Richard

  • Start Date: 20220607
  • Expected Completion Date: 0
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01847465
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 17-113
  • Files: TRB, RIP
  • Created Date: May 23 2022 3:02PM