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:
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.