基于预信号的快速路出口匝道衔接交叉口控制优化方法  

An Optimal Control Method of Intersection with an Upstream Freeway Off-ramp Using Pre-signals

作　　者：吴场建 任刚[1] 曹奇 陈永恒[2] WU Chang-jian;REN Gang;CAO Qi;CHEN Yong-heng(School of Transportation,Southeast University,Nanjing 211189,Jiangsu,China;School of Transportation,Jilin University,Changchun 130022,Jilin,China)

机构地区：[1]东南大学交通学院,江苏南京211189 [2]吉林大学交通学院,吉林长春130022

出　　处：《中国公路学报》2023年第10期269-280,共12页China Journal of Highway and Transport

基　　金：国家自然科学基金项目(52072068,52202399);江苏省研究生科研与实践创新计划项目(SJCX23_0086)。

摘　　要：为了缓解城市快速路出口匝道与下游平面交叉口衔接区域车流交织引发的交通拥堵问题,提出了一种基于预信号的快速路出口匝道衔接交叉口优化控制方法。分析了车辆从驶入衔接区域至驶出衔接交叉口的运行过程,结合不同情况下的车辆到达-驶离图示,构建了包含匝道衔接段交织延误、预信号控制延误和主信号控制延误的交叉口车辆延误计算模型。在此基础上,以衔接交叉口区域车均延误最小为优化目标,考虑了交叉口信号配时、车道分配以及排队长度等方面的约束条件,构建了基于预信号的快速路出口匝道衔接交叉口交通组织优化模型。并建立了粒子群算法对优化模型进行求解。为了验证预信号优化模型的应用效果,以长春市典型的快速路和衔接交叉口为研究对象进行案例分析,并设计了6种交通场景以验证不同几何条件、左转交通比例、交叉口饱和度下的交通效益改善情况。研究结果表明:通过设置预信号和排序区,交叉口的车辆延误和停车次数均明显降低,分别降低27.94%和12.00%,其中出口匝道驶出车流降低最为显著。灵敏性分析表明:所提出的预信号控制模型能适用于不同交通情景,并且在车道数较多、左转交通占比大以及饱和度较大的出口匝道衔接交叉口能取得较大的交通效益。研究成果可以为城市快速路出口匝道衔接区域的交通管控提供支持。To relieve traffic congestion caused by the weaving of traffic streams between the expressway off-ramp and the downstream connected intersection,an optimization control method for the intersection with an urban expressway off-ramp was proposed based on pre-signals.The operation process of vehicles from entering to leaving the junction was analyzed.By combining arrival and departure diagrams of vehicles under different conditions,the delay model was established.This model is composed of weaving delay at the ramp junction,pre-signal control delay,and main signal control delay.Consequently,a traffic organization optimization model based on pre-signal for off-ramp junction intersection of expressway was established.The objective of this model is to minimize the average vehicle delay at the junction and intersection.The constraints of this model include intersection signal timing,lane allocation,and queue length.These issues were solved using the particle swarm optimization algorithm.Typical expressway and junction intersections in Changchun were used to verify the developed model.Six traffic scenarios were designed to verify the improvement of traffic benefits under different geometric conditions,left turn traffic proportions,and intersection saturation.The results show that by setting pre-signals and sorting areas,the vehicle delay and stop times at the intersection are significantly reduced by 27.94%and 12.00%,respectively,and the off-ramp traffic flow is reduced the most.The sensitivity analysis shows that the pre-signal control model proposed in this study can be applied to different traffic scenarios.Additionally,greater traffic benefits can be achieved when the intersection has more lanes and a large proportion of left-turn traffic.The research results can provide support for the traffic control in the connection area of urban expressway off-ramp.

关 键 词：交通工程 控制策略 组合优化 出口匝道 衔接交叉口 预信号 

分 类 号：U491.5[交通运输工程—交通运输规划与管理]