Because color-coded applications of highway signs increase, specification of colors and color tolerances are required. In order to assure that the requirements are met within specified regions, a measurement technique needs to be developed and described. Having previously performed a study for daytime conditions, the National Bureau of Standards was competent to perform a study for nighttime conditions. The colorimetric properties of 126 samples of retroreflective materials of 7 different colors were measured with 3 telecolorimeters in simulated nighttime conditions. The colors measured were red, orange, brown, yellow, green, blue and silver (white). Differences of color measured by means of different telecolorimeters on the same samples were evaluated. On the basis of the color measurements and their variability tentative recommendations for color boundaries were prepared and are also included in this report.

  • Corporate Authors:

    National Bureau of Standards

    Gaithersburg, MD  United States 

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Nimeroff, I
    • Hall, W A
  • Publication Date: 1975-1

Media Info

  • Pagination: 92 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00090442
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FHWA-RD-75- 4 Final Rpt., FCP 34F4-033
  • Contract Numbers: PO 3-1-1011
  • Files: NTIS, TRIS, USDOT
  • Created Date: May 29 1976 12:00AM