U.S. Department of Transportation
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1. Report No. FHWA-SA-14-017 |
2. Government Accession No.
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3. Recipient's Catalog No. |
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4. Title and Subtitle Methods for Maintaining Pavement Marking Retroreflectivity |
5. Report Date October 2014 |
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6. Performing Organization Code |
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7. Authors Paul J. Carlson, Greg Schertz, Cathy Satterfield, Kathy W. Falk, Tim Taylor |
8. Performing Organization Report No. |
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9. Performing Organization Name and Address Texas A&M Transportation Institute |
10. Work Unit No. |
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11. Contract or Grant No. Contract DTFH61-10-D-000024 |
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12. Sponsoring Agency Name and Address Office of Safety |
13. Type of Report and Period Covered |
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14. Sponsoring Agency Code |
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15. Supplementary Notes: Research performed in cooperation with the U.S. Department of Transportation and the Federal Highway Administration. |
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16. Abstract In response to a Congressional directive, the FHWA is working to establish minimum maintained pavement marking retroreflectivity levels that will be incorporated into the Manual on Uniform Traffic Control Devices (MUTCD). One of the concerns expressed by agency personnel responsible for being in conformance with required minimum levels is the potential increase in tort exposure. The FHWA has investigated and described retroreflectivity maintenance methods that, when implemented as intended, provide agencies with a flexible means of being in conformance with required minimum retroreflectivity levels and provide protection from potential tort claims. Other properly supported methods (i.e., through the completion of an engineering study showing a tie to the minimum levels) may also be used to maintain pavement markings at the required minimum retroreflectivity levels. Agencies can use the information in this report to help determine which retroreflectivity maintenance method or combination of methods best suits their needs. |
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17. Key Words retroreflectivity, traffic control devices, pavement markings, pavement marking maintenance, minimum retroreflectivity, retroreflectometer |
18. Distribution Statement No restrictions. |
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19. Security Classif. (of this report) Unclassified |
20. Security Classif. (of this page) Unclassified |
21. No. of Pages: 53 |
22. Price |
Form DOT F 1700.7 (8-72)
Background
Pavement Marking Materials and Standards
Report Organization
CHAPTER 2. RETROREFLECTIVITY MAINTENANCE METHODS.
Introduction
Objectives of Retroreflectivity Maintenance Methods
Pavement Marking Visibility and Retroreflectivity
Pavement Marking Retroreflectivity Maintenance Methods
Visual Nighttime Inspection Methods
Measured Retroreflectivity Method
Expected Service Life Method
Blanket Replacement Method
Other Methods
Sun Over the Shoulder Technique
Comparison Panel Technique
Lane Line Count Technique
Control Markings Technique
Windshield Marking Technique
Comparison Light Box Technique
CHAPTER 3. CALIBRATED PAVEMENT MARKING PROCEDURE – VISUAL NIGHTTIME INSPECTION METHOD
Introduction
Background
General Procedures
Linking to Minimum Retroreflectivity Levels
Advantages
Concerns
CHAPTER 4. CONSISTENT PARAMETERS PROCEDURE – VISUAL NIGHTTIME INSPECTION METHOD
Introduction
Background
General Procedures
Linking to Minimum Retroreflectivity Levels
Advantages
Concerns
CHAPTER 5. MEASURED RETROREFLECTIVITY METHOD
Introduction
Background
General Procedures
Current Practice.
Linking Measurements to Minimum Retroreflectivity Levels
Advantages
Concerns
CHAPTER 6. EXPECTED SERVICE LIFE METHOD
Introduction
Procedures
Current Practice.
Linking Expected Service Life to Minimum Retroreflectivity Levels
Advantages
Concerns
CHAPTER 7. BLANKET REPLACEMENT METHOD
Introduction
Procedures
Current Practice.
Linking Blanket Replacement to Minimum Retroreflectivity Levels
Advantages
Concerns
CHAPTER 8. FREQUENTLY ASKED QUESTIONS
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