The objective was to determine the optimum design illumination level and uniformity needed on urban freeways, as related to accident rates. Data were collected from a wide variety of freeways, and compared by using the ratio of night/day accident rates per million vehicle miles. The tabulations included other factors, such as roadway elements, weather, driver age, and types of accidents, which would allow subsequent analysis as separate research. Conclusions are presented concerning daylight threshold, night traffic, lighting warrants, illumination values, lighting depreciation, roadway elements, driver age, data acquisition, and recommended future research. (HRIS)

  • Supplemental Notes:
    • Sponsored by Illuminating Engineering Research Institute, New York, New York, and Highway Users Federation for Safety and Mobility, Washington, D. C.
  • Corporate Authors:

    Illuminating Engineering Research Institute

    345 East 47th Street
    New York, NY  United States  10017
  • Authors:
    • Box, P C
    • Alroth, W A
  • Publication Date: 1970-4

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 105 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00262109
  • Record Type: Publication
  • Source Agency: National Safety Council Safety Research Info Serv
  • Report/Paper Numbers: IERI Proj 85-67
  • Files: TRIS
  • Created Date: Nov 12 1974 12:00AM