HEADLIGHT GLARE VS MEDIAN WIDTH

A DETERMINATION IS MADE OF THE MEDIAN WIDTH THAT WILL BEST AVOID BLINDING GLARE FROM HIGH-BEAM HEADLIGHTS OF ONCOMING AUTOMOBILES. TEST A WAS CARRIED OUT ON A GRAVELED AIRPLANE RUNWAY WITH SMALL VEGETATION GROWING THEREON. IT WAS FOUND, FOR EXAMPLE, THAT AT 50 MPH THE SAFE STOPPING DISTANCE IS 350 FEET AND THE MINIMUM SAFE MEDIAN WIDTH IS 30 TO 40 FEET. TO CHECK THE RESULTS OBTAINED IN TEST A, A SOURCE INTENSITY CURVE WITH CANDLEPOWER AS A FUNCTION OF MEDIAN WIDTH AND DISTANCE FROM THE SOURCE WAS PREPARED. IT WAS CONCLUDED THAT FURTHER STUDIES ARE NEEDED.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrbbulletin/298/298-008.pdf
• Supplemental Notes:
  • No 298, pp 51-55, 3 FIG, 4 TAB, 1 APP. 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:
  • Fries, John R
  • Ross, L J
• Conference:
  • 40th Annual Meeting of the Highway Research Board
  • Location: Washington DC, United States
  • Date: 1961-1-9 to 1961-1-13
• Publication Date: 1961

Media Info

• Media Type: Digital/other
• Pagination: 5p
• Monograph Title: Night visibility 1961
• Serial:
  • Highway Research Board Bulletin
  • Issue Number: 298
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Glare; Graphics; Headlamps; Luminous intensity; Medians; Stopping distances; Width
• Uncontrolled Terms: Graphical analysis
• Old TRIS Terms: Source intensity curve
• Subject Areas: Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00220223
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Aug 12 1994 12:00AM