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Title:

SUPERELEVATION AND CURVATURE OF HORIZONTAL CURVES

Accession Number:

00196647

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/309028302

Abstract:

This paper deals with the various parameters required for design of a horizontal curve, namely the relation between superelevation rate and curve radius. These parameters are derived from the characteristics of a person-vehicle-environment system. The lateral acceleration that constitutes the physical output from this system determines the critical case, for which the radius is minimum. The data used here are taken from studies dealing with human factors and traffic characteristics. The maximum superelevation rate is determined by limiting the negative lateral acceleration for slow vehicles and by assuring safe driving for fast vehicles. The development of the relation between superelevation rate and curve radius for any constant design speed is based on driver expectation that the pressure exerted on the steering wheel will decrease with increasing curve radius. The findings are compared with the U.S. and German guidelines. The criteria developed here are concluded to be reasonable and the findings useful for design pruposes. /Author/

Supplemental Notes:

Publication of this paper sponsored by Committee on Geometric Design. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.

Monograph Accession #:

01414337

Authors:

Craus, Joseph
Livneh, Moshe

Pagination:

pp 7-13

Publication Date:

1978

Serial:

Transportation Research Record

Issue Number: 685
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

0309028302

Media Type:

Print

Features:

Figures (8) ; References (13) ; Tables (3)

Uncontrolled Terms:

Design criteria; Elevation

Subject Areas:

Design; Highways; Hydraulics and Hydrology

Files:

TRIS, TRB

Created Date:

Sep 15 1979 12:00AM

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