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.

Media Info

Subject/Index Terms

Filing Info

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