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Title: Design and Testing of MASH Test Level 3 Thrie-Beam Guardrail System for Roadside and Median Applications
Accession Number: 01875921
Record Type: Component
Record URL: Availability: Find a library where document is available Abstract: Thrie-beam guardrail systems are used when enhanced Test Level 3 (TL-3) protection above that typically provided with a W-beam guardrail is desired. The currently available Manual for Assessing Safety Hardware (MASH)-compliant modified thrie-beam system incorporates components that are more costly to fabricate, and the installation creates a wider footprint than a standard W-beam guardrail. The goal of this study was to develop a cost-effective thrie-beam guardrail system (TGS) for roadside and median applications under MASH TL-3 requirements. The roadside and median TGS configurations were developed using computer simulations, and their crashworthiness was evaluated through full-scale crash testing. Additionally, transition designs from a TGS to a standard W-beam system were developed. The TGS uses all the Midwest guardrail system (MGS) standard components except for the thrie-beam rail; it has a thrie-beam rail mounted at 34?in. in height as opposed to the MGS, with a W-beam rail mounted at 31?in. The two systems are attached using a symmetric W-to-thrie-beam transition segment. Based on the results of three successful full-scale crash tests and a computer simulation, both roadside and median TGS configurations meet all safety requirements for MASH TL-3.
Supplemental Notes: Maysam Kiani https://orcid.org/0000-0001-9123-7895© National Academy of Sciences: Transportation Research Board 2023.
Language: English
Authors: Pagination: pp 439-452
Publication Date: 2023-8
Serial:
Transportation Research Record: Journal of the Transportation Research Board
Volume: 2677 Media Type: Web
Features: References
(16)
TRT Terms: Subject Areas: Design; Highways; Safety and Human Factors
Files: TRIS, TRB, ATRI
Created Date: Mar 17 2023 3:02PM
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0000-0001-9123-7895