RATINGS FOR VISUAL BENEFITS OF ROADWAY LIGHTING
COMPUTED SEEING EFFECTIVENESS RATINGS ARE PRESENTED IN TERMS OF TWO OF THE PRINCIPAL FACTORS: RELATIVE VISIBILITY AND THE RELATIVE VISUAL COMFORT. TRAFFIC RATINGS USED BY VARIOUS HIGHWAY DEPARTMENTS ON ELIMINATION STUDIES ARE DESCRIBED. IT IS CONCLUDED THAT COMPUTATION OF SIMPLIFIED SEEING FACTOR RATINGS HAS MANY ADVANTAGES INCLUDING: (1) PREDICTION OF THE EFFECTIVENESS OF ROADWAY LIGHTING IN UNDERSTANDABLE TERMS OF ROADWAY USER BENEFIT, (2) APPLICATION AND LUMINAIRE PERFORMANCE VARIABLES MAY BE EXPLORED, EVALUATED, AND CONTROLLED IN DESIGN FOR OPTIMUM OVER-ALL EFFICIENCY, (3) COMPREHENSION OF OBJECTIVES WILL BE IMPROVED, COMPLEXITY REDUCED, AND STANDARDIZATION POSSIBILITIES REVEALED, (4) PROGRESS IN DYNAMIC VISUAL RESEARCH UNDER NIGHT DRIVING CONDITIONS WILL BE ENCOURAGED BY A METHOD FOR THE USE OF THE LABORATORY AND FIELD DATA AVAILABLE, AND (5) TIME WILL BE CONSERVED. SEEING BENEFIT RATINGS AND TRAFFIC RATINGS WILL INDICATE HOW MUCH BETTER GOOD ROADWAY LIGHTING IS WHEN COMPARED WITH POOR LIGHTING. TRAFFIC BENEFIT RATINGS ALSO HELP IN DETERMINING THE IMPORTANCE OF A GOOD RELATIVE VISUAL COMFORT RATING COMPARED WITH A HIGH RELATIVE VISIBILITY RATING.
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Supplemental Notes:
- No 226, pp 27 - 55, 18 FIG, 35 REF 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.
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Authors:
- Rex, Charles H
- Publication Date: 1959
Media Info
- Media Type: Digital/other
- Pagination: 29p
- Monograph Title: Night visibility 1959
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Serial:
- Highway Research Board Bulletin
- Issue Number: 226
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Luminaires; Night vision; Performance; Ratings; Street lighting; User benefits; Visibility
- Subject Areas: Highways; Safety and Human Factors;
Filing Info
- Accession Number: 00220290
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Sep 16 1994 12:00AM