Side Friction and Speed as Controls for Horizontal Curve Design
Publication: Journal of Transportation Engineering
Volume 125, Issue 6
Abstract
This paper describes an examination of the relationship between vehicular speed and side friction demand on horizontal curves. Models of speed and friction demand are described. The curve speed model explains the effect of approach speed, radius, and superelevation rate on curve speed. The side friction model explains the effect of approach speed and curve speed reduction on side friction demand. The terms in the side friction model reflect a general desire by motorists for a lower side friction demand at higher speeds. Model terms also reflect a willingness by motorists to tolerate slightly higher side friction demand in an effort to minimize the amount of speed reduction required by relatively sharp curvature. This model is recommended as a rational basis for defining the maximum side friction factors for use in curve design.
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References
1.
Bonneson, J. A. (1999). “NCHRP Project 15-16.” Superelevation Distribution Methods and Transition Designs, Final Rep., National Cooperative Highway Research Program, Washington, D.C.
2.
Chowdhury, M. A., Warren, D. L., and Bissell, H. (1991). “Analysis of advisory speed setting criteria.” Public Roads, 55(3), 65–71.
3.
Fitzpatrick, K., Shamburger, C., Krammes, R., and Fambro, D. (1977). “Operating speed on suburban arterial curves.” Transp. Res. Rec. 1579, Transportation Research Board, Washington, D.C., 89–96.
4.
Guzman, J. (1996). “Comparison of day and night vehicular speeds on horizontal curves on rural two-lane highways.” Rep. No. TTI-04690-5, Texas Transp. Inst., Texas A&M University, College Station, Tex.
5.
Haile, E. R. (1936). “Discussion of friction factors and superelevation.” Proc., HRB, Vol. 16, Highway Research Board, Washington, D.C., 69–80.
6.
Kanellaidis, G., Golias, J., and Efstathiadis, S. (1990). “Drivers' speed behavior on rural road curves.” Traffic Engrg. and Control, London, 31(7), 414–415.
7.
Kerman, J. A., McDonald, M., and Mintsis, G. A. (1982). “Do vehicles slow down on bends? A study into road curvature, driver behavior, and design.” Proc., PTRC, 10th Summer Annual Meeting, Seminar K, 57–67.
8.
Krammes, R. A., et al. (1995). “Horizontal alignment design consistency for rural two-lane highways.” Rep. No. FHWA-RD-94-034, Federal Highway Administration, Washington, D.C.
9.
Lamm, R., Choueiri, E. M., and Mailaender, T. (1990). “Comparison of operating speeds on dry and wet pavements of two-lane rural highways.” Transp. Res. Rec. 1280, Transportation Research Board, Washington, D.C., 199–207.
10.
Manual of geometric design standards for Canadian roads. (1986). Transportation Association of Canada, Ontario, Canada.
11.
McLean, J. (1981). “Driver speed behavior and rural road alignment design.” Traffic Engrg. and Control, London, 22(4), 208–211.
12.
McLean, J. (1995). “An international comparison of curve speed prediction relations.” Rd. and Transp. Res., Victoria, Australia, 4(3), 6–14.
13.
A policy on geometric design of highways and streets. (1994). American Association of State Highway and Transportation Officials, Washington, D.C.
14.
Richtlinien für die Anlage von Straßen, RAS, Teil: Linienführung, RAS-L. (1995). Forschungsgesellschaft für Strassen- und Verkehrswesen, Kirschbaum Verlag, Bonn, Germany (in German).
15.
“Road layout and geometry: Highway link design.” (1986). Departmental Standard TD 9/81. Department of Transport: Highways and Traffic, London.
16.
Rural road design: Guide to the geometric design of rural highways. (1989). Austroads, Sydney, Australia.
17.
SAS/STAT user's guide, version 6. (1990). 4th Ed., Vol. 2, SAS Institute, Cary, N.C.
18.
Trafikleder påa landsbygd [Standard specifications for geometric design of rural roads]. (1986). National Swedish Road Administration, Borlänge, Sweden.
Information & Authors
Information
Published In
Journal of Transportation Engineering
Volume 125 • Issue 6 • November 1999
Pages: 473 - 480
History
Received: Feb 17, 1999
Published online: Nov 1, 1999
Published in print: Nov 1999
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