Theoretical Analysis for Horizontal Curves Based on Actual Discomfort Speed
Publication: Journal of Transportation Engineering
Volume 131, Issue 11
Abstract
The 2001 AASHTO publication A Policy on Geometric Design of Highways and Streets (Green Book) discusses five different methods for the distribution of side friction and superelevation rates for curves with radii greater than the minimum and recommends one of the methods for rural high-speed roads design, which is most commonly used in practice. The use of the five methods for distribution of superelevation and side friction, use of various maximum superelevation rates in adjacent jurisdictions, in addition to the use of various side friction factors for various facility types as outlined in the Green Book (rural high-speed roads, low-speed urban streets, and turning roadways) have greatly contributed to varying driving comfort and safety ranges for various highways in the United States. This study provides a theoretical analysis for selection of superelevation rates based on a set value of speed beyond the design speed (or speed limit) at which drivers start feeling lateral acceleration. This study is an attempt to simplify the complexities of this topic and provides a more consistent and clear design method.
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). (1994). A policy on geometric design of highways and streets, AASHTO, Washington, D.C.
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.” Proc., Highway Research Board, Vol. 16, Highway Research Board, Washington, D.C., 69–80.
Bonneson, J. (2000). “Superelevation distribution methods and transition designs.” NCHRP Rep. No. 439, National Cooperative Highway Research Program, Transportation Research Board, Washington, D.C.
Ervin, R., MacAdam, C., and Barnes, M. (1985). “Influence of the geometric design of highway ramps on the stability and control of heavy-duty trucks.” Transportation Research Record 1052, Transportation Research Record, Washington, D.C, 77–89.
Greene, M., and Trent, V. (2002). “A predictive rollover model for automotive vehicles.” Proc., 2002 Conf. on Industrial Electronics, Controls and Instrumentation, Seville, Spain, 1752.
Lin, R. (1994). “An investigation of active roll control for heavy vehicle suspensions.” PhD thesis, Univ. of Cambridge, Cambridge, U.K.
Mannering, F. and Kilareski, W. (1998). Principles of highway engineering and traffic analysis, 2nd Ed., Wiley, New York.
McGee, H., and Strickland, R. (1994). “An automatic warning system to prevent truck rollover on curved ramps.” Public Roads, 57(4), 94.
Moyer, R. (1934). “Skidding characteristics of automobile tires on roadway surfaces and their relation to highway safety.” Bulletin No. 120, Iowa Engineering Experiment Station, Ames, Iowa.
Moyer, R., and Berry, D. (1940). “Marking highway curves with safe speed indications.” Proc., Highway Research Board, Vol. 20, Highway Research Board, Washington, D.C., 399–428.
Olson, P., Cleveland, D., Fancher, P., Kostyniuk, L., and Scheider, L. (1984). “Parameters affecting stopping sight distance.” NCHRP Rep. No. 270, National Cooperative Highway Research Program, Transportation Research Board, Washington, D.C.
Stonex, K., and Noble, C. (1940). “Curve design and tests on the Pennsylvania Turnpike.” Proc., Highway Research Board, Vol. 20, Highway Research Board, Washington, D.C., 429–451.
Information & Authors
Information
Published In
Copyright
© 2005 ASCE.
History
Received: Feb 4, 2004
Accepted: Dec 15, 2004
Published online: Nov 1, 2005
Published in print: Nov 2005
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.