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Title:

Superelevation and Roadway Geometry: Deficiency at Crash Sites and on Grades

Accession Number:

01496039

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/0309039169

Abstract:

Survey data on roadway superelevation, curvature, and grade collected at the sites of fatal rollover accidents and at comparison sites in New Mexico and Georgia were analyzed to determine the effect of grade on superelevation after adjustment for curvature. These adjusted data were then used to determine the effect of superelevation on accidents. After adjustment for curvature, it was found that in comparison with flat roadway sections (grade +2.5 to -2.5 percent) sections with grade (greater than +2.5 or less than -2.5 percent) had less superelevation. After adjustments for both curvature and grade, fatal rollover accident sections were found to have less superelevation than comparison sections. Inadequate superelevation presents a risk that should be eliminated from the roadway system.

Supplemental Notes:

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. Publication of this paper sponsored by Committee on Operational Effects of Geometrics.

Monograph Accession #:

00495308

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Zador, Paul L
Stein, Howard
Hall, Jerome
Wright, Paul

Editors:

Kassabian, Naomi

Discussers:

Neuman, Timothy R

Pagination:

pp 43-50

Publication Date:

1985

Serial:

Transportation Research Record

Issue Number: 1026
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

0309039169

Media Type:

Print

Features:

Figures (4) ; References (11) ; Tables (2)

Uncontrolled Terms:

Curvature (Road)

Subject Areas:

Geotechnology; Highways; Passenger Transportation; Safety and Human Factors; I22: Design of Pavements, Railways and Guideways; I80: Accident Studies; I82: Accidents and Transport Infrastructure

Files:

TRIS, TRB

Created Date:

Oct 17 2013 3:15PM

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