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Title:

A MASH TL-3 Compliant Short Radius System

Accession Number:

01592194

Record Type:

Component

Abstract:

It is difficult if not physically unattainable to provide the required length of need barrier along a highway if it intersects private driveways and county roads. The presence of site constraints such as a bridge rail or a culvert along the highway may not allow the placement of a properly designed guardrail. In these cases, the alternatives are to relocate the site constraint if possible, shorten the guardrail length, or provide a curved guardrail design. The curved guardrail design is known as short radius or T-intersection depending on specifics of such constraints. Researchers and practitioners in the roadside safety area have been investigating the short radius issue. Subsequently, investigators conducted numerous crash tests for different short radius guardrail designs. None of those designs passed National Cooperative Highway Research Program (NCHRP) Report 350 TL-3 criteria (1). In 2009, the crash testing guidelines have been updated to the Manual for Assessing Safety Hardware (MASH) s (2). MASH increases the impact severity for TL-3 tests. Satisfying such impact severity became even more challenging for any short radius system. This paper presents a MASH TL-3 compliant short radius design that was successfully crash tested using impact conditions adopted from the crash cushion test matrix. Texas A&M Transportation (TTI) researchers used nonlinear finite element simulation to identify the performance of several design concepts. Then, the research team simulated the most promising design concept with refined modeling to finalize the design of the proposed short radius system. TTI staff constructed and tested successfully this short radius system per MASH TL-3 Tests conditions, namely tests 3-33, 3-32, 3-31 and 3-35.

Supplemental Notes:

This paper was sponsored by TRB committee AFB00 Section - Design. Alternate title: MASH TL-3 Compliant Short-Radius System

Monograph Accession #:

01584066

Report/Paper Numbers:

16-6948

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Abu-Odeh, Akram Y
McCaskey, Katherine M
Bligh, Roger P
Meza, Rory
Odell, Wade
Lindsey, Christopher

Pagination:

21p

Publication Date:

2016

Conference:

Transportation Research Board 95th Annual Meeting

Location: Washington DC, United States
Date: 2016-1-10 to 2016-1-14
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; Photos; References; Tables

Uncontrolled Terms:

Roadside safety hardware

Subject Areas:

Design; Highways; Safety and Human Factors; I20: Design and Planning of Transport Infrastructure; I82: Accidents and Transport Infrastructure; I85: Safety Devices used in Transport Infrastructure

Source Data:

Transportation Research Board Annual Meeting 2016 Paper #16-6948

Files:

TRIS, TRB, ATRI

Created Date:

Jan 12 2016 7:01PM