Evaluation of Portable Retroreflectometer for Use on Pavement Marking Materials

Report No: 82-R25

Published in 1981

About the report:

The subjective rating of the night visibility of pavement marking materials is difficult as it can be influenced by many variables. In an attempt to provide an improved method of determining the night visibility of these materials, a portable retroreflectometer was fabricated, and its precision and accuracy in determining night visibility were evaluated. It was concluded that the apparatus can be used to accurately measure the relative amount of reflected light for the entrance and observation angles built into it.

Documents

82-R25

_{Disclaimer Statement:The contents of this report reflect the views of the author(s), who is responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the Virginia Department of Transportation, the Commonwealth Transportation Board, or the Federal Highway Administration. This report does not constitute a standard, specification, or regulation. Any inclusion of manufacturer names, trade names, or trademarks is for identification purposes only and is not to be considered an endorsement.}

Authors

Frank D. Shepard

Last updated: January 20, 2024