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The National Academies

NCHRP 20-07/Task 310 [Completed]

Determination of Current Levels of Retroreflectance Attained and Maintained by the State Departments of Transportation
[ NCHRP 20-07 (Research for AASHTO Standing Committee on Highways) ]

  Project Data
Funds: $49,975
Research Agency: Diversified Engineering Services, Inc.
Principal Investigator: Cecil Jones
Effective Date: 4/1/2011
Completion Date: 11/30/2012

The objective of this research is to assess the retroreflectivity of lane markings attained and maintained throughout the winter season in different exposure conditions across the United States, in order to aid in determining a reasonably attainable level and assuring the state agencies that such levels can be maintained over the winter.

The final report and its Appendix C are available at http://onlinepubs.trb.org/onlinepubs/nchrp/docs/NCHRP20-07(310)_FR.pdf and http://onlinepubs.trb.org/onlinepubs/nchrp/docs/NCHRP20-07(310)_FRAttachmentC.pdf.



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