NCHRP Synthesis 431:

Practices to Manage Traffic Sign Retroreflectivity

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Size: 54 pages, 8.5 x 11

Publication Year:2012

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Authors:
Paul J Carlson; Jonathan M Re; Transportation Research Board
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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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Table of Contents
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Front Matter	i-ix
Summary	1-2	(skim)
Background	3-3	(skim)
Study Approach	4-5	(skim)
Sign Retroreflectivity Maintenance Methods	6-11	(skim)
Sign Service Life	12-13	(skim)
Visual Nighttime Inspection	14-15	(skim)
Measured Retroreflectivity	16-16	(skim)
Expected Sign Life	17-17	(skim)
Control Signs	18-18	(skim)
Sign Inventories	19-21	(skim)
Clifton Park, New York	22-22	(skim)
St. Louis County, Minnesota	23-23	(skim)
Phoenix, Arizona	24-24	(skim)
Missouri Department of Transportation	25-26	(skim)
Visual Nighttime Inspection	27-27	(skim)
Control Signs	28-28	(skim)
Chapter Six - Research in Progress and Research Needs	29-29	(skim)
Chapter Seven - Conclusions	30-30	(skim)
References	31-31	(skim)
Appendix A - Minimum Maintained Retroreflectivity Levels Resources	32-37	(skim)
Appendix B - Telephone Survey	38-39	(skim)
Appendix C - Survey Participants	40-42	(skim)
Appendix D - Myths and Other Frequently Asked Questions	43-45	(skim)

Description

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.

NCHRP Synthesis 431:

Practices to Manage Traffic Sign Retroreflectivity

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