RANGES OF STOP SIGN CHROMATICITY UNDER TUNGSTEN-HALOGEN AND HIGH-INTENSITY DISCHARGE ILLUMINATION

This study was designed to compare the magnitudes of the shifts in chromaticity of stop signs illuminated by HID and tungsten-halogen headlamps to the range of chromaticities of stop signs under tungsten-halogen. A stratified sample of 25 stop signs was selected in Ann Arbor, Michigan. Stratification was by material, age, and compass direction faced by the legend side of the sign. The chromaticities of these signs were measured in the field under both tungsten-halogen and HID illumination. The shifts between the chromaticities of the signs when they were illuminated with the tungsted-halogen source and when they were illuminated with the HID light source were moderate relative to the range of chromaticities under tungsten-halogen.

• Corporate Authors:

  University of Michigan Transportation Research Institute

  2901 Baxter Road
  Ann Arbor, MI  United States  48109-2150
• Authors:
  • Flannagan, M J
  • Sivak, M
  • GELLATLY, A W
  • Luoma, J
• Publication Date: 1992-5

Language

• English

Media Info

• Pagination: 19 p.

Subject/Index Terms

• TRT Terms: Brightness; Color; Halogens; Headlamps; High density; Stop signs; Stratification; Traffic signs; Tungsten
• Uncontrolled Terms: Intensity
• Subject Areas: Highways; Safety and Human Factors; Vehicles and Equipment; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 00628200
• Record Type: Publication
• Report/Paper Numbers: UMTRI-92-17
• Files: TRIS
• Created Date: Oct 21 1993 12:00AM