In-Service Performance Evaluation of Freeway Barriers in Guangdong Province, China

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Manjuan Yang
Hongsong Zhang

This paper presents results of an in-service performance evaluation of freeway barriers used in Guangdong Province in China. After field investigations, a total of 2455 barrier collisions were collected in 12 freeways during 2009 to 2011 from police reports and maintenance records. In the data collection area, 9 freeways’ barriers installed in roadsides or medians were consistent with M.O.T Specification for Design and Construction of Expressway Safety Appurtenance (JTJ 074-94), and 3 freeways’ barriers satisfied the requirements of M.O.T Specification for Design of Highway Safety Facilities (JTG D81-2006). Their collision performance was assessed in terms of collision severe grade, occupant injury, and vehicles pass through barrier or not. The investigation data indicate that the performance of concrete barriers is better than the W-beam barriers, and the performance of roadside W-beam barriers is better than median W-beam barriers. The outcome of buses and trucks impacting with the W-beam barriers was more serious. Impacts at portable barriers installed in median opening often resulted in serious consequence. The data suggest that there is a need to enhance crashworthy level for W-beam barriers, and develop crashworthy portable barriers, in order to prevent vehicles form passing through the system and decrease severe injuries or fatalities of vehicle occupants.

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