Welcome to the Highway Safety Manual (HSM) web site – the source for information on quantifying and evaluating highway safety performance using the Highway Safety Manual. This web site includes information on:

• What the HSM is about;
• How to get started using the HSM;
• The best approach to implementing the HSM;
• What tools, training, and resources are available; and
• How to purchase the HSM.

While this web site is hosted by AASHTO, the Association works closely with the Federal Highway Administration (FHWA) Office of Safety (click here to visit the FHWA HSM web page) and the Transportation Research Board (TRB) Highway Safety Performance Committee on issues related to the HSM.

Click on the boxes below to find out what’s new, view an informational video on the HSM, reach out to HSM users through our Discussion Forum, or find out the technical changes to the document.