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Title: RESEARCH PAYS OFF: MICHIGAN DOT REFLECTS ON SIGNS
Accession Number: 00743234
Record Type: Component
Availability: Find a library where document is available Abstract: The nighttime effectiveness of most highway signs depends on their retroreflective sheeting, which reflects vehicle headlights, allowing the text of the signs to be read. As the sheeting ages, however, it becomes less effective at reflecting light, and the legibility of the sign gradually decreases. At some point the sign should be replaced, but at what point? To date, transportation agencies have no standards to guide them in making this determination. This situation is about to be rectified. In 1993 Congress directed the Secretary of Transportation to develop retroreflectivity standards for signs. The Michigan Department of Transportation has developed a new method to assess retroreflectivity, thereby aiding compliance with the new standards. Further details are provided in this article, which discusses the problem, its solution, application of the solution, and the benefits of the solution.
Supplemental Notes: Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
Language: English
Corporate Authors: Transportation Research Board 500 Fifth Street, NW Authors: Long, DPagination: p. 24-25
Publication Date: 1997-9
Serial: Features: Figures
(1)
TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Highways; Maintenance and Preservation; Operations and Traffic Management; Research; Safety and Human Factors; I73: Traffic Control
Files: TRIS, TRB
Created Date: Dec 1 1997 12:00AM
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