Use of High Intensity Reflective Materials in Highway Signing: A Literature Review

Report No: 73-R6

Published in 1973

About the report:

This literature review summarizes the research findings relative to the performance of high intensity (encapsulated lens) reflective sheeting. The study reveals that the brightness and durability of the encapsulated lens material are superior to those of the conventional enclosed lens sheeting utilized by the Highway Department. The high intensity sheeting requires less maintenance and performs well during adverse weather conditions. Minor problems are encountered in the fabrication process, however, solutions for these are expected in the near future. Although the initial cost for encapsulated lens sheeting is higher than that of the enclosed lens material, a net savings through extended service life of signs can be anticipated through the use of the former. It is concluded that the encapsulated lens sheeting shows sufficient promise of success to warrant greater utilization of the material, especially on construction and nighttime maintenance signs.

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.


  • R. N. Robertson

Last updated: February 7, 2024

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