高速公路交通服务水平与交通安全关系研究

摘要

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 15 minutes 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.%交通服务水平是道路使用者从道路状况、交通条件、道路环境等方面可能得到的服务程度或服务质量,交通安全没有包括在评定交通服务水平的指标里.基于样本高速公路的交通流和交通事故数据,分析了路段1d24h每个小时的服务水平与交通安全的关系、每起事故发生前15 min的路段服务水平与交通安全的关系.通过比较各级交通服务水平下的交通伤亡事故水平,表明随着交通服务水平的提高,高速公路发生伤亡事故的机率也随之增加,交通事故后果越严重.