Testing of State Roadside Safety Systems, Volume II: Appendix A - Crash Testing and Evaluation of a Michigan Thrie-Beam Transition Design (FHWA-RD-96)

The purpose of this study is to crash test and evaluate new or modified roadside safety hardware and, where necessary, redesign the devices to improve their impact performance. The three major areas addressed in this study are the impact performance of bridge railings, transitions from guardrails to bridge railings, and end treatments for guardrails and median barriers.|This report presents the results of a crash test conducted on a Michigan thrie-beam transition design in accordance with guidelines set forth in NCHRP Report 230. The crash test (test no. 471470-1) involved a 2043 kg (4500-1b) passenger car traveling at a nominal speed and angle of 96.5 km/h (60 mi/h) and 25 degrees. The transition design was judged to have satisfactorily met all evaluation criteria set forth in NCHRP Report 230.|This volume is the second in a series of 14 volumes for the final report. The other volumes in the series are: Volume I - Technical Report; Volume III, Appendix B - Development and Crash Testing of a Guardrail System for Low-Fill Culvert; Volume IV, Appendix C - Crash Testing and Evaluation of a Pennsylvania Transition Design; Volume V, Appendix D - Crash - Testing and Evaluation of a Washington, DC PL-1 Bridge Rail Design; Volume VI, Appendix E - Crash Testing and Evaluation of a Modified Breakaway Cable Terminal (BCT) Design; Volume VII, Appendix F - Crash Testing and Evaluation of a Minnesota Swing-Away Mail Box Support Design; Volume VIII, Appendix G - Crash Testing and Evaluation of a Single Slope Bridge Rail; Volume IX, Appendix H - Crash Testing and Evaluation of a NETC PL-2 Bridge Rail Design; Volume X, Appendix I - Crash Testing and Evaluation of a Mini-MELT Terminal for a W-Beam Weak-Post (G2) Guardrail System; Volume XI, Appendix 1 - Crash Testing and Evaluation of Existing Guardrail Systems; Volume X11, Appendix K - Crash Testing and Evaluation of the MELT Terminal; Volume XIII, Appendix L - Crash Testing and Evaluation of the Modified MELT terminal; and Volume XIV, Appendix M - Laboratory and Pendulum Testing of a Modified Breakaway Wooden Post.