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🏛️Federal & Industry Standards
Highway Safety Manual (HSM)
WebPennsylvania Department of Transportation (PennDOT)Publication 408 — 2023 Edition
The HSM provides analytical tools and methods for measuring road safety performance, predicting crash frequency and severity, and evaluating the safety effectiveness of countermeasures. It supports data-driven safety analysis required by federal performance management rules.
Published by AASHTO. 2nd Edition, 2024.
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