The development of targets, suitable for use in dynamic field tests to measure visibility distances of drivers and to evaluate headlamp beams, is described. A dynamic field test procedure was used, and appears to have satisfactory statistical reliability. The test provides discriminations in the visibility distances attributable to variations in headlamp beams. In addition, specific tests are described for the evaluation of glare effects to opposing drivers as well as those due to reflections in mirrors from the headlamps of a following vehicle. The development of a computer simulation model, which predicts visibility distances and glare effects, is described. Comparisons between predictions of the model and the results of the field tests are shown, and provide a good fit. Some examples of the use of this model to evaluate the effects of headlamp aim and various meeting beam patterns are described. /HSRI/

  • Supplemental Notes:
    • Symposium on Driver Visual Needs in Night Driving, 4-6 September 1974, Columbus, Ohio.
  • Corporate Authors:

    Highway Safety Research Institute

    Huron Parkway and Baxter Road
    Ann Arbor, MI  United States  48109
  • Authors:
    • Mortimer, R G
  • Publication Date: 1974-9

Media Info

  • Features: Figures; Photos; References;
  • Pagination: 49 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00264492
  • Record Type: Publication
  • Source Agency: Highway Safety Research Institute
  • Files: TRIS
  • Created Date: Jan 16 1975 12:00AM