TRB Pubsindex
Text Size:
x

« Prev Next »

Return to Results | New Search

Bookmark and Share

Title:

LIMITATION OF DISABILITY GLARE IN ROADWAY LIGHTING

Accession Number:

00168080

Record Type:

Component

Availability:

Find a library where document is available


Order URL: http://worldcat.org/issn/03611981

Abstract:

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/

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.

Monograph Accession #:

01411474

Report/Paper Numbers:

HS-022 157

Authors:

Jung, F W

Pagination:

pp 33-37

Publication Date:

1977

Serial:

Transportation Research Record

Issue Number: 628
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

0309026539

Media Type:

Digital/other

Features:

Figures (4) ; References (11)

Old TRIS Terms:

Subject Areas:

Highways; Safety and Human Factors

Files:

TRIS, TRB

Created Date:

Jan 30 1978 12:00AM

More Articles from this Serial Issue: