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Highway engineers are constantly redesigning and rebuilding roadways to meet higher standards, provide safer highways and increase mobility. For the last forty years this has included designing and building roadways that are more forgiving when a driver inadvertently encroaches onto the roadside.

The TRB National Cooperative Highway Research Program's NCHRP Web-Only Document 325: Consideration of Roadside Features in the Highway Safety Manual describes the background, the research approach, the resulting run-off-road (ROR) crash predictive methods and presents a draft chapter for consideration by AASHTO for publication in the HSM.

Supplemental to the document are Appendix A and Appendix B-F.

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Suggested Citation

National Academies of Sciences, Engineering, and Medicine. 2022. Consideration of Roadside Features in the Highway Safety Manual. Washington, DC: The National Academies Press. https://doi.org/10.17226/26571.

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Publication Info

137 pages | 8.5 x 11 |  DOI: https://doi.org/10.17226/26571

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