NCHRP Report 350: Recommended Procedures for the Safety Performance Evaluation of Highway Features
Crash-test matrices, impact conditions, evaluation criteria and in-service evaluation procedures for roadside safety hardware such as guardrail, terminals, crash cushions and sign supports.
1993. Free to read online; superseded for new hardware by AASHTO MASH but still cited in UDOT contracts.
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Published by Transportation Research Board (NCHRP)
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