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Title: KINEMATIC APPROACH TO HORIZONTAL CURVE TRANSITION DESIGN
Accession Number: 00804642
Record Type: Component
Record URL: Availability: Transportation Research Board Business Office 500 Fifth Street, NW Find a library where document is available Abstract: Research has shown that vehicles shift laterally in the traffic lane during their entry to (or exit from) a horizontal curve. In addition, research indicates that most drivers momentarily adopt a path radius that is sharper than that of the roadway curve. A study was undertaken to investigate the causes of lateral shift and sharp path radii and to determine if they can be minimized (or eliminated) by modifying the horizontal curve transition design. From a review of the driver-vehicle control process, it was concluded that lane shift is due to unbalanced lateral accelerations that act on the vehicle as it enters the curve. These accelerations result from gravity, as effected through roadway superelevation, and side friction, caused by the steer angle of the vehicle. Kinematic models of lateral acceleration, velocity, and shift were developed. The calibrated models were used to develop design guidelines for superelevation rate and superelevation runoff location.
Supplemental Notes: This paper appears in Transportation Research Record No. 1737, Geometric Design and Effects on Traffic Operations 2000.
Language: English
Corporate Authors: Transportation Research Board 500 Fifth Street, NW Authors: Bonneson, J APagination: p. 1-8
Publication Date: 2000
Serial: ISBN: 0309067405
Features: Figures
(9)
; References
(10)
TRT Terms: Uncontrolled Terms: Subject Areas: Design; Highways; Planning and Forecasting; I21: Planning of Transport Infrastructure
Files: TRIS, TRB, ATRI
Created Date: Jan 11 2001 12:00AM
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