IMPROVING STEEP BENDS AS HAIRPIN CURVES ON MOUNTAINOUS ROADS
In improving steep bends on mountainous roads, an alternative is to refashion the steep bend as a hairpin curve that, by lengthening the alignment, helps correct both the curvature and the gradient. This paper treats the hairpin in its entirety in an analytical procedure. The length and orientation of the line joining the center of the middle arc to the intersection of the approach tangents emerge as significant system parameters, affecting the deviation angles of the component curves and the tangent length requirements. The paper derives relationships that enable the deviation angles and the tangent lengths to be calculated in terms of given or chosen parameters. Examples are presented that illustrate the practical use of the relationships and the computational procedures.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/oclc/8674831
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Corporate Authors:
American Society of Civil Engineers
345 East 47th Street
New York, NY United States 10017-2398 -
Authors:
- Roy, B K
- Publication Date: 1990-9
Media Info
- Features: Appendices; Figures; References; Tables;
- Pagination: p. 667-682
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Serial:
- Journal of Transportation Engineering
- Volume: 116
- Issue Number: 5
- Publisher: American Society of Civil Engineers
- ISSN: 0733-947X
- Serial URL: https://ascelibrary.org/journal/jtepbs
Subject/Index Terms
- TRT Terms: Highway curves; Highway grades; Highways; Improvements; Mountains; Slopes
- Old TRIS Terms: Hairpin curves
- Subject Areas: Design; Highways; Planning and Forecasting; I21: Planning of Transport Infrastructure;
Filing Info
- Accession Number: 00601557
- Record Type: Publication
- Files: TRIS, ATRI
- Created Date: Nov 30 1990 12:00AM