Radius Requirements for Reverse Horizontal Curves on Three-Dimensional Alignments
Publication: Journal of Transportation Engineering
Volume 130, Issue 5
Abstract
Horizontal reverse curves are used in all types of highways either in mainline alignments or in freeway interchange ramps. At present, minimum radius requirements for reverse curves are determined based on vehicle performance on each arc of the reverse curve individually without giving any consideration to the nature of the reverse curvature. This paper determines the required minimum radius for reverse curves on freeway mainlines based on vehicle stability using computer software to simulate truck behavior on different alignments. It was found that an increase to the minimum radius requirements of horizontal reverse curves is required to maintain the driver comfort levels suggested by design guides and to prevent potential rollover. That increase ranges from 8.3 to 28.8% depending on the geometric configuration of the highway as well as on the design vehicle. The design guidelines developed for horizontal reverse curves should be useful in improving road safety on highways, especially for freeway interchanges.
Get full access to this article
View all available purchase options and get full access to this article.
References
American Association of State Highway and Transportation Officials (AASHTO). (2001). “A policy on geometric design of highways and streets.” AASHTO, Washington, D.C.
Barnett, J.(1936). “Safe side friction factors and superelevation design.” Highw. Res. Board, Proc. Annu. Meet., 16, 69–80.
Easa, S. M. (1994). “Design considerations for highway reverse curves.” Transportation Research Record. 1445, Transportation Research Board, National Research Council, Washington, D.C., 1–11.
Easa, S. M. (2002). “Geometric design.” Civil engineering handbook, 2nd Ed., Chemical Rubber, New York.
Easa, S., and Dabbour, E.(2003). “Design radius requirements for simple horizontal curves on 3D alignments.” Can. J. Civ. Eng., 30(6), 1022–1033.
Garcia, L. O., Wilson, F. R., and Innes, D. (2003). “Heavy truck dynamic rollover: Effect of load distribution, cargo type and road design characteristics.” Annual Meeting, Transportation Research Board, Washington, D.C.
Harwood, D. W., and Mason, J. M. (1994). “Horizontal curve design for passenger cars and trucks.” Transportation Research Record. 1445, Transportation Research Board, National Research Council, Washington, D.C., 22–33.
Harwood, D. W., Mason, J. M., Glauz, W. D., Kulakowski, B. T., and Fitzpatrick, K. (1990). “Truck characteristics for use in highway design and operation.” Rep. Nos. FHWA-RD-89-226 and FHWA-RD-89-227, U.S. Dept. of Transportation, Washington, D.C.
Hunter, M., Machemehl, R., and Tsyganov, A. (2001). “Operational evaluation of freeway ramp design.” Transportation Research Record. 1751, Transporation Research Board, National Research Council, Washington, D.C. 90–100.
MacAdam, C. C., Fancher, P. S., and Segel, L. (1985). “Side friction for superelevation on horizontal curves.” Transportation Research Institute, Univ. of Michigan, Rep. No. UMTRI-72895, Ann Arbor, Mich.
McGee, H. W. (1981). “Synthesis of large truck safety research.” Wagner–McGee Associates, Alexandria, Va.
Moyer, R. A., and Berry, D. S.(1940). “Marking highway curves with safe speed indications.” High. Res. Board, Proc. Annu. Meet., 20, 399–428.
National Cooperative Highway Research Program (NCHRP). (2001). “Synthesis 299: Recent geometric design research for improved safety and operations.” Transportation Research Board, National Research Council, Washington, D.C.
Transportation Association of Canada (TAC). (1999). “Geometric design guide for Canadian roads.” TAC, Ottawa, Ont., Canada.
Information & Authors
Information
Published In
Copyright
Copyright © 2004 American Society of Civil Engineers.
History
Received: May 7, 2003
Accepted: Oct 21, 2003
Published online: Aug 16, 2004
Published in print: Sep 2004
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.