​The Purpose of the HSM

The purpose of the HSM is to assess the safety impacts of transportation project and program decisions. To help users get started, this web page includes:

• General information on the HSM in a Fact Sheet and Brochure.
• Information tailored to state DOT leaders in the Executive Flyer.
• Possible applications for the HSM.
• Information about technical assistance available through TRB User Liaison Technology Subcommittee, and by contacting highwaysafetymanual@aashto.org. Support is coordinated by AASHTO and other technical experts.

The project development process is explained by clicking on the boxes to the right.