An urban traffic tunnel safety evaluation system must be set up in order to make a synthetical evaluation of the running safety and improve the running safety quality of the traffic tunnel.
为确保城市交通隧道的运营安全，需要建立城市交通隧道安全系统评价体系，对城市交通隧道的运营安全性能进行综合评价，提高城市交通隧道的运营安全品质。
An automatic accident detection method based on traffic flow parameters will be accessed, through simulating the physical environment of urban tunnel with traffic simulation software VISSIM.
采用VISSIM交通仿真软件，对城市隧道内的物理环境进行仿真，可设计出一种基于交通流参数的交通事故自动检测方法。
An automatic accident detection method based on traffic flow parameters will be accessed, through simulating the physical environment of urban tunnel with traffic simulation software VISSIM.
采用VISSIM交通仿真软件，对城市隧道内的物理环境进行仿真，可设计出一种基于交通流参数的交通事故自动检测方法。
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