CURRENT PRACTICES IN USE OF RETRO REFLECTIVE SIGNING MATERIALS

The major findings are presented of a questionnaire survey (of what material combinations are being used and the basis for their selection) which was part of a research effort to define the optimum relationship between sign background and legend luminance as a function of several pertinent variables. The questionnaire elicited information on the types of signing material; practices relating to illumination; inspection and maintenance practices; criteria and methods for refurbishing existing signs, and determining the time of replacement; and the useful life of various sign face materials. Material combinations must frequently used are summarized in a table. The combinations must frequently mentioned were button copy on paint or porcelain enamel and button copy on engineer-grade sheeting. With reference to sign employing direct-applied letters, symbols, or legends, material use was evenly divided between engineer grade and high-intensity sheeting. Findings related to illumination of road signs, photometric specifications, quality control, maintenance and replacement are also discussed.

• Record URL:
  • http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rrd_87.pdf
• Supplemental Notes:
  • Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Publication Date: 1976-3

Media Info

• Media Type: Digital/other
• Features: Tables;
• Pagination: 5 p.
• Serial:
  • NCHRP Research Results Digest
  • Issue Number: 87
  • Publisher: Transportation Research Board

Subject/Index Terms

• TRT Terms: Brightness; Equipment maintenance; Inspection; Light; Paint; Photometry; Quality control; Questionnaires; Retroreflectors; Road marking materials; Service life; Sheathing; Specifications; Surveys; Traffic signs
• Uncontrolled Terms: Criteria; Replacing
• Old TRIS Terms: Buttons; Porcelain; Traffic marking materials; Traffic sign maintenance
• Subject Areas: Design; Geotechnology; Highways; Maintenance and Preservation; Materials; Safety and Human Factors;

Filing Info

• Accession Number: 00132912
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Jun 5 1976 12:00AM