Degradation of the visual capacity of a motor vehicle driver caused by luminous sources on the driver's own vehicle during daylight is quantified according to luminance glare theory. Effects of driver's age and daylight conditions are considered, and a means for laboratory measurement of vehicle glare production characteristics is developed. Based upon a probabalistic model of target detection, allowable glare in the field of view is determined. It is found that spot glare sources do not materially contribute to degradation of visual capacity (with the model), that the dash of the motor vehicle is generally the largest contributor to glare, and that suitable design changes to motor vehicles would allow them to meet the criterion established. Laboratory measurements with both collimated and diffuse sources are shown to be necessary to adequately evaluate motor vehicle performance.

  • Corporate Authors:

    Teledyne Brown Engineering

    Huntsville, AL  United States 

    National Highway Traffic Safety Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Raine, W L
    • Chatterton, N E
    • Dunn, A R
  • Publication Date: 1975-9

Media Info

  • Pagination: 120 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00093360
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: Final Rpt., DOT-HS-801-718
  • Contract Numbers: DOT-HS-4-00925
  • Files: NTIS, TRIS, USDOT
  • Created Date: Dec 16 1976 12:00AM