基于事件检测效益的高速公路交通检测器布设方案研究

Layout of Traffic Detectors on Expressway Based on Efficiency of Detecting Incidents

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。

Reasonable layout of traffic detectors on expressway is beneficial to detect time, location and nature of traffic incidents accurately and rapidly to improve the efficiency of management and control system of expressway. In this paper, a simplified traffic incident detection algorithm based on prediction deviation is proposed and three kinds of layout schemes of the 200 m, 400 m and 600 m are put forward ac- cording to experience. And then simulation of Ji-De Section of Ji-Qing Expressway is executed by VISSIM to validate which layout is optimum scheme to detect traffic incidents according to variation tendency of typical traffic parameters.