A field investigation of the effect off driver's age on nighttime legibility of highway signs was performed. Subjects of two age groups (under 25 and over 61 years of age) participated. The results indicate that the legibility distances for the older subjects were 65-77% of those for the younger subjects with equal high-luminance visual acuity. This finding implies that older drivers ar likely to have less distance (and thus less time as well) in which to act on the information transmitted by highway signs. Consequently, it is argued that (1) legibility standards for highway signs should not be based exclusively on data obtained from young observers, and (2) standard (high- luminance) acuity tests have questionable relevance to nighttime visual performance. (A)

  • Supplemental Notes:
    • Sponsored by the National Retired Teachers Association, and the American Assocition of Retired Persons.
  • Corporate Authors:

    Highway Safety Research Institute

    Huron Parkway and Baxter Road
    Ann Arbor, MI  United States  48109
  • Authors:
    • Sivak, M
    • Olson, P L
    • Pastalan, L A
  • Publication Date: 1979

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 20 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00319857
  • Record Type: Publication
  • Source Agency: National Safety Council Safety Research Info Serv
  • Report/Paper Numbers: UM-HSRI-79-52
  • Files: TRIS, ATRI
  • Created Date: Feb 6 1981 12:00AM