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Title:

TANGENT LENGTH AND SIGHT DISTANCE EFFECTS ON ACCIDENT RATES AT HORIZONTAL CURVES ON RURAL TWO-LANE HIGHWAYS

Accession Number:

00715004

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/issn/03611981

Abstract:

Most models for evaluating operating-speed consistency on two-lane rural highways estimate operating-speed profiles based on tangent length and degree of horizontal curvature. Some models also consider the effect of sight distance to horizontal curves. To add insight on the effects of these variables on safety and operations at horizontal curves, a base relationship between accident rates at horizontal curves and degree of curvature was established, and the effects of approach tangent length and approach sight distance on this relationship were examined. The results confirm that degree of curvature is a good predictor of accident rates on horizontal curves. Although the effects of approach tangent length and sight distance were not as clear, the results suggest that the adverse safety effects of long approach tangent length and short approach sight distance become more pronounced on sharp curves.

Supplemental Notes:

This paper appears in Transportation Research Record No. 1500, Geometric Design, Roadside Safety Features, Roadside Hardware Monitoring, and Scenic Loop Tours. 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 #:

01399820

Language:

English

Authors:

Fink, Kenneth L
Krammes, Raymond A

Pagination:

p. 162-168

Publication Date:

1995

Serial:

Transportation Research Record

Issue Number: 1500
Publisher: Transportation Research Board
ISSN: 0361-1981

Features:

Figures (5) ; References (15) ; Tables (2)

Uncontrolled Terms:

Horizontal curvature; Tangent length

Subject Areas:

Design; Highways; Safety and Human Factors; I20: Design and Planning of Transport Infrastructure; I81: Accident Statistics

Files:

TRIS, TRB

Created Date:

Dec 26 1995 12:00AM

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