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高速公路交通检测器合理布设有利于准确、快速地检测和确认交通事件发生的时间、地点及性质,进而提高高速公路管控效率。运用一种基于偏差阈值的交通事件检测算法,选取了200m、400m和600m等3种交通检测器布设间距,利用VISSIM仿真软件,以济青高速公路济德段为例进行验证性仿真;通过分析有无事件情况下交通参数的变化趋势,确定高速公路检测器最优布设间距,为高速公路监测系统建设提供理论依据。
The reasonable arrangement of expressway traffic detector is conducive to accurately and quickly detecting and confirming the time, place and nature of traffic accidents, thereby improving the efficiency of expressway management and control. Using a traffic incident detection algorithm based on deviation threshold, three kinds of traffic detectors such as 200m, 400m and 600m are chosen to be deployed. VISSIM simulation software is used to verify the simulation in the case of Jinan Section of Jinan-Qinghai Expressway. The trend of traffic parameters with or without event, determine the optimal layout distance of expressway detector, and provide theoretical basis for the construction of expressway monitoring system.