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Performance Evaluation of a Dual Support Sign with Ground Mounted Pipe Posts and Multi-Directional Slip Bases




James Holloway, John Reid




Two full-scale vehicle crash tests were performed on a dual support sign with ground mounted pipe posts and multi-directional slip bases. Test MO2-1 was conducted with a 1987 Yugo GV weighing 845 kg (1862 lbs) at an impact speed of 36.4 km/h (22.6 mph) and an angle of 0 degrees. Test MO2-2 was conducted with the same vehicle at an impact speed of 96.7 km/h (60.1 mph) and an angle of 0 degrees. The vehicle impacted both posts simultaneously, according to the recommended criteria. The tests were conducted and reported in accordance with the requirements specified in the Recommended Procedures for the Safety Performance Evaluation of Highway Features, National Cooperative Research Program (NCHRP) Report No. 350 and the American Association of State Highway and Transportation Officials (AASHTO), 1994 Standard Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals. The safety performance evaluation of the highway sign was determined to be acceptable according to these criterion for support structures.


Highway Signs, Breakaway Supports, Multi-Directional Slip Base, Highway Safety, Crash Tests

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