INSTRUMENTAL COLOR MEASUREMENT OF RETROREFLECTIVE HIGHWAY SIGN MATERIALS

THE COLORIMETRIC PROPERTIES OF SEVENTY-FOUR SAMPLES OF RETROREFLECTIVE HIGHWAY SIGN MATERIALS WERE OBTAINED BY VISUAL MEASUREMENTS OUTDOORS USING FIVE OBSERVERS HAVING NORMAL COLOR VISION, AND BY THREE PHOTOELECTRIC TRISTIMULUS COLORIMETERS AND A RECORDING SPECTROPHOTOMETER. COOPERATIVE MEASUREMENTS BY TWO INDUSTRIAL COLOR LABORATORIES ARE ALSO REPORTED. THE RESULTS OBTAINED INDICATE THAT MEASUREMENTS MADE WITH FIVE COLORIMETERS HAVING 45 DEGREE, 0 DEGREE GEOMETRY ARE IN GENERAL AGREEMENT. MEASUREMENTS MADE WITH FIVE INSTRUMENTS HAVING DIFFUSE ILLUMINATION AND UNIDIRECTIONAL VIEWING GEOMETRY ARE ALSO IN GENERAL AGREEMENT; IN ADDITION, THESE MEASUREMENTS AGREE MORE CLOSELY WITH THE VISUAL COLOR EVALUATIONS THAN THOSE MADE WITH THE 45 DEGREE, 0 DEGREE GEOMETRY INSTRUMENTS. A DISCUSSION OF THE RESEARCH NECESSARY TO DEVELOP INSTRUMENTAL TECHNIQUES FOR THE MEASUREMENT OF THE COLOR OF RETROREFLECTIVE MATERIALS UNDER NIGHTTIME VIEWING CONDITIONS IS ALSO INCLUDED. /AUTHOR/

• Corporate Authors:

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590

  National Bureau of Standards /US

  ,    
• Authors:
  • Nimeroff, I
• Publication Date: 0

Subject/Index Terms

• TRT Terms: Colorimetry; Materials; Measuring instruments; Night; Retroreflectors; Spectrophotometers; Traffic signs
• Subject Areas: Geotechnology; Highways; Materials; Safety and Human Factors;

Filing Info

• Accession Number: 00215974
• Record Type: Publication
• Source Agency: Federal Highway Administration
• Report/Paper Numbers: Study No Po-1-1-0929
• Files: TRIS, USDOT
• Created Date: Feb 15 1972 12:00AM