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DEVELOPMENT OF A SAFE END TREATMENT FOR W-BEAM-ON BARRELS BARRIER

The objective of this study was to develop a safe end treatment for W-Beam-On-Barrels Barrier (WEBB). The WEBB terminal currently used in Texas was first tested and found to be unacceptable in terms of impact performance. A modified terminal consisting of a stand up barrier end attached to a steel drum by a W-beam end section (buffer' was developed. Two full scale vehicular crash tests were conducted to evaluate the impact behavior of the design. Since the WEBB is a low performance level, temporary barrier it was decided that test conditions (vehicle weight, impact speed and impact angle) recommended for higher performance level permanent roadside appurtenances were not appropriate. The basic difference between the selected conditions and those recommended for permanent installations involved the impact speed. A 50 mph (80.5 km/h) impact speed was used in lieu of the 60 mph speed used for permanent installations. As a result of the crash testing it was concluded that the design was acceptable in terms of impact performance. (Author)