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The Safe System approach is a holistic approach that provides a framework for making the U.S. national transportation system safer. It is based on building and reinforcing multiple layers of protection to prevent crashes from happening and minimize the harm caused when crashes occur. This safety approach differs from conventional ones because it focuses on human vulnerability and creates a system with many redundancies to protect all transportation users.

NCHRP Research Report 1135: A Guide to Applying the Safe System Approach to Transportation Planning, Design, and Operations, from TRB's National Cooperative Highway Research Program, presents information for applying the Safe System approach among state departments of transportation and other transportation agencies.

Supplemental to the report is NCHRP Web-Only Document 413: Applying the Safe System Approach to Transportation Planning, Design, and Operations.

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Suggested Citation

National Academies of Sciences, Engineering, and Medicine. 2025. A Guide to Applying the Safe System Approach to Transportation Planning, Design, and Operations. Washington, DC: The National Academies Press. https://doi.org/10.17226/29147.

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Publication Info

102 pages |  8.5 x 11 |  Paperback
ISBN: 978-0-309-99350-0
DOI: https://doi.org/10.17226/29147
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