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ABSTRACT

This report documents two full-scale crash tests conducted in support of a study to investigate the safety performance of Wisconsin Department of Transportation’s (WisDOT’s) Midwest Guardrail System (MGS) with half-post spacing adjacent to a 2H:1V slope. The test installation consisted of 175-ft long MGS with 75-ft long section of the barrier installed with ½ post spacing with 7-ft long W6x9 posts adjacent to a 2H:1V slope. The full-scale crash tests were conducted according to Manual for Assessing Safety Hardware 2016 (MASH 2016) criteria using Test-Level 3 (TL-3) test designation nos. 3-10 and 3-11, respectively. In test no. MGS7S-1, an 1100C small car impacted the barrier at a speed of 62.8 mph and an angle of 25.2 degrees. In the test no. MGS7S-2, a 2270P quad cab pickup truck impacted the barrier at a speed of 62.6 mph and an angle of 25.4 degrees. In both tests, the guardrail successfully contained and redirected the vehicle, and it did not penetrate or show potential for debris to penetrate the occupant compartment. All occupant risk measurements were below the maximum thresholds. Thus, test nos. MGS7S-1 and MGS7S-2 successfully met the TL-3 safety performance criteria defined in MASH 2016.

KEYWORDS

Highway Safety, Crash Test, Roadside Appurtenances, Compliance Test, MASH 2016, Longitudinal Barrier, TL-3, Midwest Guardrail System

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