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TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 431: Practices to Manage Traffic Sign Retroreflectivity includes examples of practices that illustrate how different types of transportation agencies might meet federal retroreflectivity requirements for traffic signs.

Suggested Citation

National Academies of Sciences, Engineering, and Medicine. 2012. Practices to Manage Traffic Sign Retroreflectivity. Washington, DC: The National Academies Press.

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Publication Info

44 pages |  8.5 x 11 |  Paperback
ISBN: 978-0-309-22360-7

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