MASH 2016 Evaluation of the Modified Thrie Beam System

US Transportation Collection2020PDFTech ReportBielenberg, Robert W.Faller, Ronald K.Jiang, HuaHolloway, James C.Midwest Roadside Safety FacilityNebraska Transportation CenterUniversity of Nebraska--LincolnNew Jersey. Dept. of TransportationCalifornia. Dept. of Transportation. Division of Research, Innovation, and System InformationUnited States. Department of Transportation. Federal Highway AdministrationMidwest Roadside Safety FacilityNebraska Transportation CenterUniversity of Nebraska--LincolnUnited StatesBarriers (Roads)Crash testsThrie beamsHighway safetyCompliance TestMASH 2016Test Level 3 (TL-3)Roadside AppurtenancesModified Thrie Beam (MTB)TRP-03-417-20TPF-5(193) Supplement #132Final Report: 2018 \u2013 2020This report documents the evaluation of the New Jersey Department of Transportation (NJDOT) modified thrie beam (MTB) system in both a single-sided roadside configuration and a dual-sided median configuration under Manual for Assessing Safety Hardware 2016 (MASH 2016) Test-Level 3 (TL-3) criteria. The MTB system was previously tested and approved under National Cooperative Highway Research Program Report No. 350 TL-3 impact conditions. Two full-scale crash tests, test nos. MTB-1 and MTB-2, were conducted according to test designation nos. 3-11 and 3-10, respectively. In test no. MTB-1, a single-sided roadside barrier configuration was constructed using 81-in. long W6x8.5 steel posts at 75-in. post spacing, W14x22 blockouts, and 12-gauge guardrail sections. A 5,003-lb quad cab pickup truck impacted the critical impact point of the system at a speed of 62.9 mph and an angle of 25.4 deg. The test vehicle was satisfactorily captured and smoothly redirected. Therefore, test no. MTB-1 was deemed successful according to MASH 2016 TL-3 safety performance criteria. Test no. MTB-2 was conducted on a dual-sided median barrier configuration of the modified thrie beam. A 2,415-lb small car impacted the critical impact point of the system at a speed of 63.1 mph and an angle of 24.9 deg. The test vehicle was satisfactorily captured and smoothly redirected. Therefore, test no. MTB-2 was deemed successful according to MASH 2016 TL-3 safety performance criteria.120