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Highway Safety Manual      Welcome to the Highway Safety Manual website. Here you can find news, resources supporting implementation of the HSM, and a user discussion forum.  NEWS:  Spreadsheets for Part C calculations are available: Download information Direct link to spreadsheets Join the User Discussion Forum! Download directions for receiving emails when new messages are posted FHWA has published "A Guide for Developing Quality Crash Modification Factors" Errata for the first edition.   LINKS TO HIGHWAY SAFETY MANUAL PARTNERS: FHWA Highway Safety Manual Website TRB Safety Performance Committee Website   Visit the AASHTO Bookstore for ordering information. Brochures and Other Materials Introduction Brochure Fact Sheet FHWA Resource Center Webinar Recordings