Quantitative Safety Analyses for Highway Applications

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April 4th, 2025

Development of the AASHTO Highway Safety Manual began from a TRB conference session and a workshop, both held in 1999, that identified the need for a traffic safety document analogous to the role of the Highway Capacity Manual for traffic operations.

NCHRP Research Report 1140: Quantitative Safety Analyses for Highway Applications, from TRB’s National Cooperative Highway Research Program, describes a multiyear research process undertaken to improve the state of the practice for quantitative safety analyses for highway applications.

Read the full findings here.