DRIVER EYE HEIGHT AND VEHICLE PERFORMANCE IN RELATION TO CREST SIGHT DISTANCE AND LENGTH OF NO-PASSING ZONES. II. VERTICAL CURVE DESIGN
WHILE THERE IS A DOWNWARD TREND IN THE TOTAL HEIGHT AND RESULTING LEVEL OF DRIVER'S EYE FOR PASSENGER CARS, ITS RESULTS ON THE SIGHT DISTANCE OVER CRESTS DOES NOT APPEAR TO BE SIGNIFICANT ENOUGH TO WARRANT CHANGE IN PRESENTLY USED DESIGN METHODS AND STANDARDS. CURRENT PASSENGER CAR MODELS HAVE DRIVER EYE HEIGHT THAT REDUCES CREST SIGHT DISTANCE BY SOMEWHAT UNDER 5 PERCENT AND THE LIKELY LOWEST FUTURE RANGE MAY REDUCE THE SIGHT DISTANCE UPWARDS OF 10 PERCENT. THESE PERCENTAGES ARE UNIMPORTANT CONSIDERING THE VARIABLES UPON WHICH CURRENT DESIGN FORMULA ARE BASED. /AUTHOR/
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Supplemental Notes:
- No 195, pp 4-8, 1 FIG, 3 TAB. 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:
- Loutzenheiser, D W
- Haile Jr, E R
- Publication Date: 1958
Media Info
- Media Type: Digital/other
- Monograph Title: Relation between vehicle characteristics and highway design
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Serial:
- Highway Research Board Bulletin
- Issue Number: 195
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Automobiles; Curves (Geometry); Design; Design standards; Drivers; Eye; Height; Length; No passing zones; Sight distance; Vehicle performance
- Uncontrolled Terms: Vertical curvature
- Subject Areas: Design; Highways; Safety and Human Factors;
Filing Info
- Accession Number: 00220275
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Aug 19 1994 12:00AM