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Safety > Visibility including Retroreflectivity
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Regulation Document Date Contact(s) National Standards for Traffic Control Devices; the Manual on Uniform Traffic Control Devices for Streets and Highways; Maintaining Traffic Sign Retroreflectivity 12/21/2007 - Cathy Satterfield 708-283-3552, Office of Safety
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Guidance Document Date Contact(s) Maintaining Traffic Sign Retroreflectivity 3/26/2013 - Cathy Satterfield 708-283-3552, Office of Safety
Clarifying Guidance on Application of Daytime-Luminance Factors in 23 CFR 655 1/11/2013 - Cathy Satterfield 708-283-3552, Office of Safety
- Kevin Sylvester 202-366-2161, Office of Operations
FHWA Lighting Handbook August, 2012 - Joe Cheung 202-366-6994, Office of Safety
Revised Recommended Minimum Maintained Retroreflectivity Levels for Blue and Brown Traffic Signs 4/05/2012 - Cathy Satterfield 708-283-3552, Office of Safety
Methods for Maintaining Traffic Sign Retroreflectivity November, 2007 - Cathy Satterfield 708-283-3552, Office of Safety
NCHRP Report 500 Volume 7: A Guide for Reducing Collisions on Horizontal Curves 6/10/2004 - Joe Cheung 202-366-6994, Office of Safety
NCHRP 500 (various topics for each volume) 2004 - Aimee Zhang 202-366-6537, Office of Safety