NEW AND IMPROVED UNSYMMETRICAL VERTICAL CURVE FOR HIGHWAYS
A new unsymmetrical vertical curve for highways that provides important desirable features is developed. The curve has unequal horizontal projections of the tangents, but its component parabolic arcs are equal. The new curve minimizes the difference between the rates of change of grades of the two arcs and consequently provides a smoother ride and is more aesthetically pleasing. The curve also improves the sight distance, reduces the length requirements, increases rider comfort, and increases the vertical clearance compared with the traditional unsymmetrical vertical curve. These desirable features should make the new unsymmetrical vertical curve an important element in vertical alignment design.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/0309060516
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Supplemental Notes:
- This paper appears in Transportation Research Record No. 1445, Cross Section and Alinement Design Issues. 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:
- Easa, Said M
- Publication Date: 1994
Language
- English
Media Info
- Features: Figures; References; Tables;
- Pagination: p. 94-100
- Monograph Title: Cross section and alinement design issues
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Serial:
- Transportation Research Record
- Issue Number: 1445
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Aesthetics; Alignment; Comfort; Highway design; Riding qualities; Sight distance
- Uncontrolled Terms: Vertical alignment; Vertical clearance; Vertical curvature
- Subject Areas: Design; Highways; I20: Design and Planning of Transport Infrastructure;
Filing Info
- Accession Number: 00675334
- Record Type: Publication
- ISBN: 0309060516
- Files: TRIS, TRB, ATRI
- Created Date: Mar 20 1995 12:00AM