VISUAL DATA ON ROADWAY LIGHTING
ADDITIONAL DATA IS PRESENTED ON SEEING FACTOR EFFECTIVENESS RATINGS FOR ROADWAY LIGHTING. SUCH RATINGS PROVIDE AN ESSENTIAL BASIS FOR HIGHWAY ENGINEERING EVALUATION OF TRAFFIC, ECONOMIC, AND HUMAN BENEFITS. FIELD MEASUREMENTS FOR DIFFERENT ROADWAY LIGHTING SYSTEMS ARE CONTINUING, ARE SIGNIFICANT, AND SHOULD BE REPORTED FOR THE GUIDANCE OF HIGHWAY ENGINEERS INTERESTED IN IMPROVING NIGHT MOTOR VEHICLE TRANSPORTATION. PRELIMINARY TESTS SHOW THAT ABOUT TWICE AS MUCH PAVEMENT BRIGHTNESS IS REQUIRED FOR EQUIVALENT L-M VISIBILITY WHEN THE TARGET IS DYNAMIC (0.1- TO 0.2-SEC EXPOSURE) INSTEAD OF STATIC. THIS IS BASED ON RATINGS BY EIGHT OBSERVERS. MEASUREMENTS MADE WITH THE NEW BLACKWELL PORTABLE VISUAL TASK EVALUATOR ARE REPORTED AND COMPARED WITH THOSE OBTAINED WITH THE FINCH VISIBILITY METER. EXPERIENCE GAINED AT HENDERSONVILLE USING THE FIRST PROTOTYPE MODEL OF THIS METER RETARDED MEASUREMENTS EARLIER THIS YEAR. MORE EXTENSIVE DATA ARE NOW AVAILABLE AND ARE PRESENTED. /AUTHOR/
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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.
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Authors:
- Rex, Charles H
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Conference:
- 41st Annual Meeting of the Highway Research Board
- Location: Washington DC, United States
- Date: 1962-1-8 to 1962-1-12
- Publication Date: 1962
Media Info
- Media Type: Digital/other
- Features: Appendices; Figures; References; Tables;
- Pagination: pp 61-75
- Monograph Title: Night visibility 1962
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Serial:
- Highway Research Board Bulletin
- Issue Number: 336
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Brightness; Field tests; Highway engineering; Highway transportation; Measuring instruments; Motor vehicles; Night; Pavements; Ratings; Street lighting; Visibility
- Uncontrolled Terms: Field measurements
- Subject Areas: Highways; Pavements; Safety and Human Factors;
Filing Info
- Accession Number: 00220121
- Record Type: Publication
- Files: TRIS, TRB, ATRI
- Created Date: Aug 5 1994 12:00AM