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The Lead States Initiative for Implementing the HSM (NCHRP 17-50) is developing a HSM User Guide, which will be available in the near future, to show practical approaches to HSM implementation. Following are brief descriptions of what they accomplished.

  • Utah – Reviewed Highway Safety Improvement Program (HSIP) and Design Exception processes, updated typically applied Crash Modification Factors, and developed training.
  • Missouri – Increased internal understanding, established an implementation team, provided training, developed policy and guidance, and provided technical support.
  • Louisiana – Incorporated HSM methodologies into policy by gaining leadership approval and commitment, and developed a short- (0 to 3 years), and long-term (3 to 7 year) implementation plan.
  • Alabama – Identified HSM users and their needs, and determined data needs.

Implementation Resources

The HSM Implementation Guide for Managers – Outlines what the HSM is (and is not), how it relates to other core technical documents and policies, and the potential benefits of its use particularly improvements in the safety performance of the highway system.

Integrating the HSM into the Project Development Process – This guide provides practitioners with examples and ideas for integrating safety performance measures into the project development process, including planning, alternatives development and analysis, design, operations, and maintenance.

Example Applications

If you are using the HSM and would like the information to be posted on the HSM web site, send your information to Kelly Hardy at AASHTO,

Case Studies

Click on the states to see how they used the HSM.

FloridaOhioIllinoisNew HampshireIdaho