基于车道选择行为分析的交通标志优化设置

Model on Location Optimization of Traffic Sign Based on Lane Choice Behavior

摘要:

分析了驾驶员变换车道时的认读标志行为，从感觉、知觉、判断、执行4个阶段分析快速路连续交通流条件下车道变换所需的时间及距离。给出了认读标志过程中消失点位置的确定方法.结合安全行车要求给出了车辆变道时的临界可穿越空档.通过引入变道成功概率，分析了车辆变道所需的最小行动距离.在此基础上建立了交通标志设置最小前置距离的理论模型.模型输出结果显示，其他条件相同时，流量越高，车辆变道时所需交织段长度越大，交通标志的最小前置距离也越大.模型应用于烟台市同三高速公路交通标志的优化设置，得到在不同变道成功概率下交通标志设置

Abstract:

Drivers’ reading and reaction process was analyzed and divided into four stages,including sensory,perception,judgment and execution.An analysis was also made of the necessary time and distance for lane change under uninterrupted traffic flow on expressway,and a method was proposed to determine visual disappearing site of traffic sign.Critical crossing time gap in lane change was established with a consideration of weaving safety.By introducing success probability of lane change,minimum driving distance for lane change was formulated.Then a theoretical model was established to describe minimum required frontal distance in traffic sign installation.The outputs of the model show that the weaving distance becomes longer when traffic volume is larger.The minimum frontal distance of traffic sign increases evidently as traffic volume becomes larger.The proposed model was tested in a section of TongSan freeway in the city of Yantai to verify its rationality.Finally,the paper presents the minimum frontal distance of traffic sign under different sucess probabilities of lane change.