Highway Safety Manual

Updated on Nov 05, 2023

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The Highway Safety Manual (HSM)is a publication of the American Association of State Highway Transportation Officials. It contains concepts, guidelines, and computational procedures for predicting the safety performance of various highway facilities.

The HSM was published in 2010 and is divided into four sections:

Part A – Introduction, Human Factors, and Fundamentals of Safety;

Part B – Roadway Safety Management Process;

Part C – Predictive Methods; and

Part D – Crash Modification Factors.

References

Highway Safety Manual Wikipedia

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