this project was instituted to determine minimum and maximum limits of vehicle control lable illumination and to recommend procedures for compliance testing. In order to establish a minimum brightness level, a psychophysical procedure was used to establish the 95 percent correctness threshold for 95 percent of older drivers (ages ranged from 45 to 67). The correctness threshold and subject response times were obtained over eight letter brightness levels, four letter sizes and three contrast ratios. The results showed that minimum brightness levels must be specified as a function of letter size and contrast ratio. /NTIS/

  • Corporate Authors:

    Wayne State University

    Department of Industrial Engineering
    Detroit, MI  United States  48202

    National Highway Traffic Safety Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Langolf, G D
    • Mourant, R R
    • FISHER, J
  • Publication Date: 1974-10

Media Info

  • Pagination: 84 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00082928
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: Final Rpt.
  • Contract Numbers: DOT-HS-4-00864
  • Files: NTIS, TRIS, USDOT
  • Created Date: Mar 26 1975 12:00AM