Practices to Manage Traffic Sign Retroreflectivity
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Transcript of Practices to Manage Traffic Sign Retroreflectivity
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PRACTICES TO MANAGE
TRAFFIC SIGN RETROREFLECTIVITYNCHRP Project 20-05Synthesis Topic 42-12
Paul CarlsonJune 21, 2011
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Synthesis Objective
•Document the state-of-the-practice
•Provide examples of effective strategies
•Show how other agencies can remain in compliance
•Determine needs and areas of future research
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Report Status
•Draft Final Report complete
•Panel meeting June 28, 2011 Irvine, California
•Report published before end of the year
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Report Outline• Background
• Description of MUTCD Maintenance Methods
• Range of Practices
• Case Studies
• Best Practices
• Research in Progress and Research Needs
• Conclusions
• Appendices – Policies, Practices, Guidelines, Documentation / Reporting
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MUTCD: Section 2A.08 Maintaining Minimum Retroreflectivity
Standard:
Public agencies or officials having jurisdiction shall use an assessment or management method that is designed to maintain sign retroreflectivity at or above the minimum levels in Table 2A-3.
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MUTCD Methods
•Visual assessment
•Measured retroreflectivity
•Expected sign life
•Blanket replacement
•Control signs
•Future methods
•Combination of methods
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Current Compliance Dates
•Jan 2012 Implementation and continued use of an
assessment or management method
•Jan 2015 Replacement of noncompliant regulatory, warning,
and post-mounted guide signs
•Jan 2018 Replacement of noncompliant street name signs
and overhead guide signs
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Survey Participants16 states, 9 cities, 15 counties, and 9 others
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Methods Being Used
MUTCD MethodsPrimary Sign
Replacement MethodSecondary or
Support Method
Nighttime Inspection 13 2
Measured Retro. 2 0
Expected Sign Life 17 16
Blanket Replacement 7 4
Control Signs 2 10
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Case Studies
•St. Louis County, Minnesota
•City of Phoenix, Arizona
•Missouri Department of Transportation
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MUTCD maintenance methods
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MUTCD maintenance methods
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FHWA-HRT-08-026FHWA-SA-07-020
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Discussions and
Questions