United States Department of Transportation
i
MASH Test 3-11 Evaluation of Modified TxDOT Round Wood Post Guardrail System
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2019-06-01
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[PDF-7.12 MB]
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Alternative Title:Roadside Safety Device Analysis, Testing, and Evaluation Program
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Edition:Technical Report, September 2017–August 2018
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Abstract:The purpose of the testing reported herein was to assess the performance of the free-standing single slope concrete barrier (SSCB) with cross-bolt connections according to the safety-performance evaluation guidelines included in American Association of State Highway and Transportation Officials’ Manual for Assessing Safety Hardware (MASH) for Test Level Four (TL-4). The crash test performed was in accordance with MASH Test 4-12 criteria, which involves a 10000S single unit truck impacting the barrier at a target impact speed and angle of 56 mi/h and 15°, respectively. The free-standing SSCB with cross-bolt connection successfully contained and redirected the single unit truck. The barrier performed acceptably for MASH Test 4-12. The maximum dynamic and permanent barrier deflections were each 33.0 inches. In addition to the TL-4 crash test, researchers performed a detailed finite element analysis to determine the expected lateral deflection of the barrier under MASH Test 4-11 conditions, which involve impacting the barrier with a 2270P pickup truck vehicle with a target impact speed and angle of 62 mi/h and 25°, respectively. The maximum lateral barrier deflection for the pickup truck impact was estimated to be in the range of 12.5 inches to 16.8 inches.
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