The development of targets for use in field tests to measure visibility distances of drivers and to evaluate head lamp beams is described. The test procedure used appears to have satisfactory statistical reliability. The test provides discriminations in the visibility distances attributable to variations in head lamp beams. In addition, tests that evaluate glare effects to opposing drivers and those due to reflections in mirrors from the head lamps of a following vehicle are described. The development of a computer simulation model that predicts visibility distances and glare effects is described. Model predictions and the results of the field tests are compared and provide a good fit. Some examples of the use of this model to evaluate the effects of head lamp aim and various meeting beam patterns are described.

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  • Supplemental Notes:
    • Presented at a symposium conducted by TRB, September 4-6, 1974 at Ohio State University, and sponsored by TRB, Illuminating Engineering Research Institute, Ohio University and Ohio Department of Transportation. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
  • Corporate Authors:

    Transportation Research Board (TRB)

    Washington, DC   
  • Authors:
    • Mortimer, Rudolf G
  • Conference:
  • Publication Date: 1975

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 64-73
  • Monograph Title: Driver visual needs in night driving: proceedings of a symposium conducted by the Transportation Research Board, September 4-6, 1974
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00129398
  • Record Type: Publication
  • Report/Paper Numbers: HS-017 803
  • Files: TRIS, TRB, ATRI
  • Created Date: Apr 21 1976 12:00AM