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《Journal of Transport Information and Safety》 2012-05
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Relationship between Level of Service and Traffic Safety on Freeway

ZHANG Jie 1 SUN Xiaoduan 2 XIONG Bin 1 HE Yulong 2 LIU Xiaoming 2(1.Bazhong Transport Bureau,Bazhong636000,Sichuan,China;2.Beijing Key Laboratory of Traffic Engineering,Beijing University of Technology,Beijing100022,China)  
Level of service(LOS) is a quality measure describing operational conditions within a traffic stream.Traffic safety is not an index to be used to assess LOS.Based on the data of traffic flow and crashes of a freeway,the relationships between hourly LOS and traffic safety of segments in a representative day,and between LOS 15minutes before a crash and traffic safety were studied.The level of casualty of crashes on different LOS was analyzed.The results show that with the improvement of LOS,the occurrence probability of an injury or fatal crash increases on the freeway and the crashes tend to be more serious.
【Fund】: 国家自然科学基金项目(批准号:50778007)资助
【CateGory Index】: U491.4
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