NCHRP Synthesis 431: Practices to Manage Traffic Sign Retroreflectivity
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NCHRP Synthesis 431:
Practices to Manage Traffic Sign Retroreflectivity
(2012)
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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.

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54 pages | 8.5 x 11
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