Existing crash test performance of longitudinal barrier systems was reviewed for compliance with NCHRP Report 230. Based on this review a matrix of five guardrail, two median barrier, and four bridge systems was evaluated with full-scale crash tests for occupant risk with 1,800-lb sedans. The results were evaluated using the recommended values of NCHRP Report 230 to which all systems were essentially in compliance. In addition, evaluation of five guardrail and one median barrier systems was performed with an 1,800-lb sedan impacting at 60 mph and a 20-deg angle (test S13 of NCHRP Report 230). The purpose of these tests was to provide further insight into the performance of the barrier systems. Six insight tests using vans to determine barrier performance thresholds for this type of vehicle were performed. Seven transition tests were performed as follows: three guardrail/bridge rail transitions, two guardrail/guardrail transitions, and two median barrier/median barrier transitions. Finally, two additional insight tests were performed. The first was a van impacting a G1 cable guardrail system mounted at a 24-in. height. The second test evaluated a blocked-out W-beam system with round wood posts. The final report includes the crash test results, design drawings for the systems tested in this research as well as for systems tested in other studies, and recommended changes to the test criteria.
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