REPORT ON VEHICLE AND HIGHWAY MECHANICS AS RELATED TO TRAFFIC
A REPORT IS PRESENTED ON AN EXTENSIVE SERIES OF TESTS OF MOTOR VEHICLE HEADLIGHTING INCLUDING: VISIBILITY DISTANCES ON STRAIGHT ROADS, VISIBILITY DISTANCES IN GENERAL BOTH WITH AND WITHOUT OPPOSING CARS, SPREAD NEEDED FOR HEADLIGHT BEAMS AND GLARE AND INTENSITY OF ILLUMINATION NEEDED TO ENABLE THE DRIVER TO SEE THE ROAD SHOULDER. A STRIKING CONCLUSION FROM THE TESTS OF BEAM SPREAD IS THAT THE GREAT EMPHASIS UPON SHARP CUT-OFF AND EXACT AIMING IN VOGUE A FEW YEARS AGO HAD NO RATIONAL BASIS IN HEADLIGHT PERFORMANCE. A MOST IMPORTANT ELEMENT IN AVOIDING DANGER IN MEETING OTHER CARS WAS FOUND TO BE ADEQUATE LIGHT ON THE ROADSIDE SINCE SIGHT TO THE REAR OF THE OPPOSING CAR IS ALMOST NEGLIGIBLE. CONCLUSIONS DEFINING HEADLIGHTING CONDITIONS CONDUCIVE TO BEST RESULTS AND SUGGESTIONS FOR FUTURE STUDY ARE PRESENTED. /AUTHOR/
- Record URL:
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Supplemental Notes:
- Vol 11, Pt 1, PP 388-409, 23 FIG. 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:
- Dickinson, H C
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Discussers:
- Halvorson, C
- Publication Date: 1932
Media Info
- Media Type: Digital/other
- Monograph Title: Proceedings of the Eleventh Annual Meeting of the Highway Research Board Held at Washington, D.C. December 10-11, 1931. Part I: Reports of Research Committees and Papers
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Serial:
- Highway Research Board Proceedings
- Volume: 11
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Drivers; Glare; Headlamps; Light; Motor vehicles; Opposing traffic; Visibility; Vision
- Old TRIS Terms: Driver vision
- Subject Areas: Highways; Safety and Human Factors;
Filing Info
- Accession Number: 00223297
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Jun 1 1971 12:00AM