Maintaining Traffic Sign Retroreflectivity (2003)
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2003-12-01
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Abstract:This document provides recommendations and general information about minimum maintained retroreflectivity levels and the methods that can be used to maintain sign retroreflectivity. Information contained in this document is intended for policy-makers and managers. Sign maintenance methods are divided into two groups - assessment methods and management methods. Assessment methods involve the actual evaluation of individual signs, while management methods involve tracking and/or predicting the retroreflectivity of signs.
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