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- W606798045 abstract "Wider medians that do not require median barriers often contain isolated hazards such as bridge piers, large sign supports, and openings between twin bridge structures. The treatment of these hazards has varied considerably among the States with a large number of different designs. Based on a state-of-the-art review, the bullnose or closed barrier envelope around the hazard was selected as the most promising concept. A high-performance guardrail system, the modified thrie beam, was selected as the guardrail system for design/development in this project. This system has successfully contained both a 20,000-lb (9040 kg) school bus and a 32,000-lb (14,500 kg) intercity bus striking the barrier at 60 mi/h (95 km/h) and a 15-degree angle. A total of sixteen crash tests were conducted on bullnose designs using 1800-lb (800 kg) and 4000-lb (2000 kg) cars and a 5400-lb (2500 kg) pickup truck. These tests were conducted with the barrier installed in a representative ditch determined to be a typical depressed median. Thus, minimal site work is believed to be needed for application of the design to typical median cross section geometries. Results of the tests are promising; however, additional testing will be required to complete the evaluations of the final recommended design. Drawings of the installation are included in Appendix A of this report. This report (Volume I) contains a summary of the work conducted in this project; Volume II contains full-scale test reports and a summary of the state-of-the-art review (FHWA No. RD-88/005, Appendixes B and C)." @default.
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- W606798045 date "1987-10-01" @default.
- W606798045 modified "2023-09-26" @default.
- W606798045 title "MEDIAN BARRIER TERMINALS AND MEDIAN TREATMENTS. VOLUME I: RESEARCH REPORT AND APPENDIX A. FINAL REPORT" @default.
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