多车道高速公路门架式交通标志遮挡概率研究  

Study of Occlusion Probability for Overhead Signs of Multilane Expressway

作　　者：邓亚娟[1] 李苗苗 胡小霞 胡绍荣[3] DENG Ya-juan;LI Miao-miao;HU Xiao-xia;HU Shao-rong(School of Highway, Chang＇an University, Xi＇an 710064, China;Taizhou Urban and Rural Planning Design Institute, Taizhou 318000, China;Shaanxi Provincial Transport Department, Xi＇an 710075, China)

机构地区：[1]长安大学公路学院交通工程系,西安市710064 [2]台州市城乡规划设计研究院,台州市318000 [3]陕西省交通运输厅,西安市710075

出　　处：《公路》2018年第4期179-184,共6页Highway

基　　金：陕西省交通运输厅科技项目,项目编号13-36R

摘　　要：基于车辆车头坐标、与前车跟车距离等动态数据,确定多车道高速公路驾驶人在视认区域内视线被遮挡的最大和最小临界距离;建立多车道高速公路门架式交通标志遮挡模型,借助VISSIM软件获取基础计算数据,实现高速公路门架式交通标志遮挡概率计算过程的动态化。对计算结果进行统计分析得出：在交通量一定的情况下,驾驶人视线被遮挡概率和驾驶人错过标志的概率随着大型车混入率的增大而增大;在大型车混入率一定的情况下,驾驶人视线被遮挡概率和驾驶人错过标志的概率随着交通量的增大而增大;在同样的交通条件下,驾驶人视线遮挡概率相对驾驶人错过交通标志概率稍微偏高,并不是所有被遮挡的驾驶人都会错过交通标志信息。Based on the head coordinates of vehicle, and the distance from the vehicle to follow vehicle and other dynamic data, the maximum and minimum critical distance of occlusion probability within the area of sight are calculated. The overhead signs occlusion model is established, and basis calculating data is obtained by VISSIM to realize the dynamic process of the occlusion probability of overhead signs. The statistical results show that the probabilities of missing the traffic sign and the driver＇s sight line is blocked increase with the increase of the truck volume in the outside lane when traffic volume is constant; probabilities of missing the traffic sign and the driver＇s sight line is blocked increase with the increases of traffic volume when the truck volume is constant; the smaller the speed of car will miss the greater the traffic sign. Under the same traffic condition, the probability of the driver＇s sight line is blocked is slightly higher than that of missing the traffic sign, and not all drivers whose sight line is blocked will miss the traffic sign information.

关 键 词：多车道高速公路 门架式交通标志 遮挡临界点 VISSIM 遮挡概率 

分 类 号：U491.522[交通运输工程—交通运输规划与管理]