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Title:

VEHICLE IMPACT TESTS OF BREAKAWAY WOOD SUPPORTS FOR DUAL-SUPPORT ROADSIDE SIGNS

Accession Number:

00370560

Record Type:

Component

Availability:

Find a library where document is available


Order URL: http://worldcat.org/isbn/0309033721

Abstract:

Since the late 1960s, the California Department of Transportation has used 6 x 8-in. (nominal) or smaller wood posts and timber poles (classes 1-6) that have drilled holes near the bases as breakaway supports for dual-support roadside signs. Due to the recent increase in the lightweight-car population, crash tests were conducted with 2205-lb cars on these designs to determine whether they met performance criteria recommended in Transportation Research Circular 191 (now superseded by National Cooperative Highway Research Program Report 230, which recommends tests with even lighter-weight cars (1800 lb)). When impacted by 2205-lb vehicles at 19.8 and 57.7 mph, the 6 x 8-in. wood posts met all the criteria. A 9.25-in-diameter timber pole impacted by a 2205-lb vehicle at 19.2 mph did not break away. A modified timber-pole design was similarly tested; it broke away but was still too stiff. Consequently, timber-pole supports are no longer used on new construction in California. A 7.875 x 14.875-in. laminated wood veneer box-section post that had saw cuts in the webs was impacted with a 2205-lb vehicle at 19.2 and 58.4 mph and met all test criteria. The design was adopted as a standard in California. A number of full-scale pendulum and static-bend tests on various breakaway support designs was conducted during this project. (Authors)

Supplemental Notes:

Publication of this paper sponsored by Committee on Safety Appurtenances. 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 #:

00380038

Report/Paper Numbers:

HS-035 207

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Stoughton, Roger L
Stoker, J Robert
Nordlin, Eric F

Pagination:

pp 28-38

Publication Date:

1982

Serial:

Transportation Research Record

Issue Number: 868
Publisher: Transportation Research Board
ISSN: 0361-1981

Conference:

61st Annual Meeting of the Transportation Research Board

Location: Washington District of Columbia, United States
Date: 1982-1-18 to 1982-1-22

ISBN:

0309033721

Media Type:

Print

Features:

Figures (21) ; Photos (47) ; References (16)

Subject Areas:

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

Files:

HSL, TRIS, TRB

Created Date:

Feb 28 1983 12:00AM

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