逆向可变车道动态切换及信号控制优化方法  

A Method of Dynamic Switch Control and Signal Timing Optimization for Reverse Variable Lane

作　　者：张泰文 张存保[1] 周斌[1] 曹雨 罗舒琳 ZHANG Taiwen;ZHANG Cunbao;ZHOU Bin;CAO Yu;LUO Shulin(Intelligent Transportation Systems Research Center,Wuhan University of Technology,Wuhan 430063,China)

机构地区：[1]武汉理工大学智能交通系统研究中心,武汉430063

出　　处：《交通信息与安全》2020年第5期59-66,共8页Journal of Transport Information and Safety

基　　金：国家重点研发计划项目(2018YFB1601000)资助。

摘　　要：为弥补逆向可变车道切换控制方法判断条件较为单一,且配套的信号控制方法难以适应交通流动态变化的不足,提出逆向可变车道动态启停切换及交通信号优化控制方法。根据交叉口流向饱和度、车道切换效益与车道切换时间间隔等指标获取逆向可变车道动态切换控制决策,实现逆向可变车道的动态开启和关闭;同时,利用检测器获取车辆到达率、车道饱和流率与剩余排队车辆数等实时交通流数据,根据车流到达驶离图示推导交叉口车均延误计算公式。引入左转车道释放流率系数,修正左转车道释放流率,改进了交叉口延误计算公式,构建以延误最小为目标的交叉口信号配时动态优化模型。最后,以武汉市古田四路-长丰大道交叉口为对象开展了仿真实验,结果表明:相比于定时切换控制方式,动态切换控制与信号配时动态优化方式下的逆向可变车道交叉口车均延误减少6.7%~14.9%,含有逆向可变车道进口方向的左转车均延误减少7.6%~15.6%,平均排队长度减少6.4%~21.9%,验证了动态控制方法提升交叉口运行效率的有效性。In order to make up defects that judgment conditions considered in reverse variable lane switching method are relatively simple and associated signal control method is difficult to adapt to dynamic changes of traffic flow,a method of dynamic switch control and signal timing optimization for reverse variable lane is proposed.According to indices of flow saturation,lane switching benefits,and switching interval,dynamic switching control decision of the reverse variable lane is obtained and dynamic opening and closing of reverse variable lane is realized.Meanwhile,actual data of traffic flow such as vehicle arrival rate,lane saturation flow rate,and stranded vehicles are collected by detectors,and the formulas for calculating average vehicle delay are derived according to vehicles arrival and departure diagram.The left-turn release flow rate correction parameters is introduced to modify the release flow rate of left turn lane,and the formulas for calculating the average vehicle delay are optimized.A model of signal timing optimization aiming at the minimum delay is established.Finally,a simulation is carried out by taking the intersection of Gutian Fourth Road and Changfeng Avenue in Wuhan as a case study.The simulation results indicate that compared with the fixed-time switching control method,the proposed method can reduce the average delay of the intersection with reverse variable lane by 6.7%~14.9%,and the average delay of left-turn vehicles from the approaching with reverse variable lane is reduced by 7.6%~15.6%,and average queue length is reduced by 6.4%~21.9%,which proves the effectiveness of proposed control method.

关 键 词：交通控制 逆向可变车道 动态切换控制 信号配时优化 自适应信号控制 

分 类 号：U491.54[交通运输工程—交通运输规划与管理]