LIMITATION OF DISABILITY GLARE IN ROADWAY LIGHTING

Safety and comfort while driving at night depend on the visual detection of objects, which is based on contrast. The performance of this visual task is related to the relative contrast sensitivity of the lighting system provided, which is a function of roadway or background luminance of disability glare from luminaires by specifying a minimum value of effective relative contrast sensitivity for a particular road class is proposed. A simple formula has been derived for the effective relative contrast sensitivity of a lighting system by using curve-fitted, standardized data. Glare control by limiting the relative contrast sensitivity can be achieved by a permissible glare formula or a diagram. The method is demonstrated by examples. Relative-contrast-sensitivity glare control can also be combined with a method that is based on limiting the threshold increment of a critical-size object. The relative-contrast-sensitivity method and the visibility-index method both use the same concept of contrast-sensitivity change with glare. /Author/

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/trr/1977/628/628-006.pdf
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=LIMITATION+OF+DISABILITY+GLARE+IN+ROADWAY+LIGHTING&author=F.+Jung&publication_year=1977
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03611981
• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Visibility. 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:
  • Jung, F W
• Publication Date: 1977

Media Info

• Media Type: Digital/other
• Features: Figures; References;
• Pagination: pp 33-37
• Monograph Title: Lighting, visibility and railroad-highway grade crossings
• Serial:
  • Transportation Research Record
  • Issue Number: 628
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Contrast; Drivers; Glare; Highway safety; Lighting; Luminaires; Mathematical models; Night visibility; Vision
• Old TRIS Terms: Driver vision
• Subject Areas: Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00168080
• Record Type: Publication
• ISBN: 0309026539
• Report/Paper Numbers: HS-022 157
• Files: TRIS, TRB
• Created Date: Jan 30 1978 12:00AM