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Title:

USE OF GUARDRAILS ON LOW FILL BRIDGE LENGTH CULVERTS

Accession Number:

00490178

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/0309047722

Abstract:

When multiple box culverts span more than 20 feet, the American Association of State Highway and Transportation Officials (AASHTO) defines them as bridge length and, thus, normally requires the use of a full-strength, rigid bridgerail. Using a rigid bridgerail creates a transition problem between the flexible metal beam guard fence, which is commonly used upstream of the bridgerail. It would be safer and more economical to continue the flexible metal beam guard fence across the culvert even when the culvert is more than 20 feet long and when the soil fill depth over the culvert is less than the standard guardrail post embedment depth (38 inches in Texas). It was believed that more post could be used (reduced post spacing) with a shallow embedment to achieve the desired guardrail strength. A metal beam guard fence design of this type was crash tested in this study and proved to be unsatisfactory. Another concept investigated was to rigidly mount steel guard fence posts to the top of the culvert deck when full soil embedment could not be achieved. A design of this type was also crash tested in this study and proved to be satisfactory.

Supplemental Notes:

This paper appears in Transportation Research Record No. 1198, Roadside Safety Features. 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 Title:

Roadside safety features

Monograph Accession #:

01413999

Authors:

Hirsch, T J
Beggs, Dale

Pagination:

p. 62-75

Publication Date:

1988

Serial:

Transportation Research Record

Issue Number: 1198
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

0309047722

Features:

Figures (17) ; Photos; References (5) ; Tables (1)

Uncontrolled Terms:

Embedment; Transition zones

Old TRIS Terms:

Subject Areas:

Design; Highways; Research; Safety and Human Factors; I85: Safety Devices used in Transport Infrastructure

Files:

TRIS, TRB, ATRI

Created Date:

Dec 31 1989 12:00AM

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