NIGHT VISIBILITY FOR OPPOSING DRIVERS WITH HIGH AND LOW HEADLIGHT BEAMS

THE RELATIVE VISIBILITY OF TWO TASKS WHICH ARE TYPICAL OF THOSE ENCOUNTERED IN THE NIGHTTIME DRIVING SITUATION WAS EXPLORED USING THE VISUAL TASK EVALUATOR MEASUREMENT TECHNIQUE. THE TASKS WERE ILLUMINATED WITH EITHER HIGH OR LOW HEADLIGHT BEAMS. AN OPPOSING VEHICLE WAS LOCATED AT ONE OF SEVERAL LONGITUDINAL SEPARATIONS WITH THE SAME BEAM CONFIGURATION AS THAT OF THE OBSERVERS TO SIMULATE A SINGLE APPROACHING VEHICLE AT ONE OF FOUR DIFFERENT MEDIAN WIDTHS. DISABILITY GLARE MEASUREMENTS WERE MADE WITH A PRITCHARD PHOTOMETER AND THE OVERALL VISIBILITY EVALUATED THROUGH AN ANALYTICAL PROCEDURE. /AUTHOR/

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/hrr/1965/70/70-010.pdf
• Supplemental Notes:
  • 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
• Authors:
  • Schwab, Richard N
• Publication Date: 1965

Media Info

• Media Type: Print
• Features: Figures;
• Pagination: pp 87-88
• Monograph Title: Night Visibility 1963 and 1964
• Serial:
  • Highway Research Record
  • Issue Number: 70
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Beams; Drivers; Evaluation; Glare; Headlamps; Measurement; Night visibility; Opposing traffic; Photometers; Physical disabilities; Visibility
• Uncontrolled Terms: High
• Old TRIS Terms: Low; Pritchard photometer; Visual task evaluator
• Subject Areas: Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00219552
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Dec 12 1994 12:00AM