城市高架快速路出口匝道衔接交叉口控制方法研究
发布时间：2018-08-20 18:13
【摘要】：城市高架快速路作为城市交通的重要组成部分,在城市交通拥堵日益严重的趋势下,高架快速路"进不去,出不来"的交通问题日益频现,其中出口匝道区域拥堵则是较为突显的问题之一;当出口匝道下游衔接交叉口时,交通需求过大往往会导致交叉口处于过饱和状态,进口道和匝道排队回溢至速路主路及上游交叉口,"出不来"现象更为严重。因此进行匝道衔接交叉口的信号控制优化研究,提升出口匝道衔接区域通行效率,对缓解出口匝道及下游交叉口区域交通拥堵是非常重要的。为缓解城市高架快速路"出不来"的交通问题,本文着重对出口匝道与下游交叉口衔接区域的交通流模型和信号控制优化方法进行研究;具体研究工作如下:本文首先系统地分析总结了快速路出入口匝道控制方法及过饱和交叉口控制方法的研究、应用现状;对高架快速路出口匝道的设置形式、衔接进口道的交通组织方式进行了分类分析,并结合VISSIM仿真研究了不同交织流量比对交织区的影响。针对匝道驶出车辆流向不同所导致的匝道衔接段交织问题,综合考虑了不同车道中的自由变道模型和强制变道模型,分析了相邻元胞间变道传输概率,同时引入了虚拟元胞滞留车辆的检验方法,构建了出口匝道衔接段的改进元胞传输模型。以交叉口常规进口道和匝道衔接进口道为算例,验证结果表明改进元胞传输模型能较为真实地模拟不同进口道的排队形成与消散过程。结合变绿信比变周期策略和绿灯延长或提前启亮的思想,本文提出了考虑绿灯时间间隔的变绿信比变周期控制策略,利用改进元胞传输模型构建了各进口道元胞流量传输与信号相位关联的控制模型,通过该模型将交叉口信号控制与路网交通流传输和元胞状态更新整合;以改进元胞传输模型所获交通效率评价指标为基础,以加权平均延误作为目标函数,构建了综合考虑各进口车道饱和度状态的信号控制优化模型,同时结合遗传算法实现了该类型交叉口的动态优化。充分考虑交叉口不同饱和度状态,利用MATLAB编程构建匝道及衔接交叉口元胞传输模型,并实现交叉口信号配时的实时动态优化控制和路网状态更新;最后以成都市二环高架快速路牛市口出口匝道及衔接交叉口为实例,以晚高峰交通量作为交通需求输入,验证表明模型对该类型交叉口非饱和、饱和状态均有较好的控制优化效果。
[Abstract]:As an important part of urban traffic, urban elevated expressway is becoming more and more frequent in the trend of urban traffic congestion. The congestion of the exit ramp is one of the more prominent problems. When the downstream of the exit ramp is connected to the intersection, the traffic demand will often lead to the intersection in a state of supersaturation. The phenomenon of "not coming out" is more serious when the inlet and ramp queue overflows to the main road and the upstream intersection of the speed road. Therefore, it is very important to optimize the signal control of the ramp junction and improve the efficiency of the exit ramp junction area to alleviate the traffic congestion of the exit ramp and downstream intersection. In order to alleviate the traffic problem of "not coming out" of urban elevated expressway, this paper focuses on the study of traffic flow model and signal control optimization method in the junction area of exit ramp and downstream intersection. The specific research work is as follows: firstly, this paper systematically analyzes and summarizes the control methods of exit ramp and over-saturated intersection, the application status, the setting form of exit ramp of elevated expressway, The traffic organization mode of the junction entrance is classified and analyzed, and the influence of different interleaving flow ratio on the interleaving area is studied by VISSIM simulation. Aiming at the interleaving problem of ramp junction caused by the different flow direction of off-ramp vehicles, the free and forced lane changing models in different lanes are considered synthetically, and the probability of channel transfer between adjacent cells is analyzed. At the same time, an improved cellular transmission model of exit ramp junction is constructed by introducing the inspection method of virtual cell stranded vehicle. By taking the conventional entrances and ramps of intersections as an example, the results show that the improved cellular transmission model can simulate the formation and dissipation process of different entrances. Combined with the variable period strategy of changing green signal ratio and the idea of extending the green light or opening the signal ahead of time, this paper proposes a variable period control strategy of the green signal ratio considering the green time interval. By using the improved cellular transmission model, the control model of the correlation between the cell flow transmission and the phase of the signal is constructed, through which the intersection signal control is integrated with the road network traffic flow transmission and the cellular state update. Based on the traffic efficiency evaluation index obtained by the improved cellular transmission model and the weighted average delay as the objective function, a signal control optimization model considering the saturation state of each import vehicle is constructed. At the same time, the genetic algorithm is used to realize the dynamic optimization of the intersection. Considering the different saturation states of intersection, the cellular transmission model of ramp and junction is constructed by MATLAB programming, and the real-time dynamic optimal control of intersection signal timing and the updating of road network status are realized. Finally, taking the bullish exit ramp of the second Ring Expressway in Chengdu as an example, taking the late peak traffic volume as the traffic demand input, the model shows that the model is unsaturated to this type of intersection. The saturation state has better control optimization effect.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U491.54
本文编号：2194552
[Abstract]:As an important part of urban traffic, urban elevated expressway is becoming more and more frequent in the trend of urban traffic congestion. The congestion of the exit ramp is one of the more prominent problems. When the downstream of the exit ramp is connected to the intersection, the traffic demand will often lead to the intersection in a state of supersaturation. The phenomenon of "not coming out" is more serious when the inlet and ramp queue overflows to the main road and the upstream intersection of the speed road. Therefore, it is very important to optimize the signal control of the ramp junction and improve the efficiency of the exit ramp junction area to alleviate the traffic congestion of the exit ramp and downstream intersection. In order to alleviate the traffic problem of "not coming out" of urban elevated expressway, this paper focuses on the study of traffic flow model and signal control optimization method in the junction area of exit ramp and downstream intersection. The specific research work is as follows: firstly, this paper systematically analyzes and summarizes the control methods of exit ramp and over-saturated intersection, the application status, the setting form of exit ramp of elevated expressway, The traffic organization mode of the junction entrance is classified and analyzed, and the influence of different interleaving flow ratio on the interleaving area is studied by VISSIM simulation. Aiming at the interleaving problem of ramp junction caused by the different flow direction of off-ramp vehicles, the free and forced lane changing models in different lanes are considered synthetically, and the probability of channel transfer between adjacent cells is analyzed. At the same time, an improved cellular transmission model of exit ramp junction is constructed by introducing the inspection method of virtual cell stranded vehicle. By taking the conventional entrances and ramps of intersections as an example, the results show that the improved cellular transmission model can simulate the formation and dissipation process of different entrances. Combined with the variable period strategy of changing green signal ratio and the idea of extending the green light or opening the signal ahead of time, this paper proposes a variable period control strategy of the green signal ratio considering the green time interval. By using the improved cellular transmission model, the control model of the correlation between the cell flow transmission and the phase of the signal is constructed, through which the intersection signal control is integrated with the road network traffic flow transmission and the cellular state update. Based on the traffic efficiency evaluation index obtained by the improved cellular transmission model and the weighted average delay as the objective function, a signal control optimization model considering the saturation state of each import vehicle is constructed. At the same time, the genetic algorithm is used to realize the dynamic optimization of the intersection. Considering the different saturation states of intersection, the cellular transmission model of ramp and junction is constructed by MATLAB programming, and the real-time dynamic optimal control of intersection signal timing and the updating of road network status are realized. Finally, taking the bullish exit ramp of the second Ring Expressway in Chengdu as an example, taking the late peak traffic volume as the traffic demand input, the model shows that the model is unsaturated to this type of intersection. The saturation state has better control optimization effect.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U491.54
【参考文献】
相关期刊论文 前10条
1 杨泳;严余松;户佐安;古沐松;;城市快速路改进型元胞传输模型及仿真[J];公路交通科技;2015年06期
2 高云峰;韩皓;胡华;;信号控制交叉口交通行为的简单二维元胞传输模型[J];系统工程理论与实践;2015年01期
3 魏丽英;王志龙;吴荣华;;交叉口进口道换道行为研究及建模[J];物理学报;2014年04期
4 陈学文;张衍成;陈昕;崔瑶;袁航;;快速路出口匝道下游交叉口配时模糊控制[J];辽宁工程技术大学学报(自然科学版);2013年01期
5 首艳芳;徐建闽;;信号交叉口多目标动态决策模型及其优化方法[J];公路交通科技;2012年11期
6 杨东霞;巨永锋;;基于CTM的交通信号多目标优化方法[J];交通运输工程学报;2011年03期
7 袁长亮;李宏海;;快速路出口辅路与地面交叉口协调控制策略研究[J];道路交通与安全;2010年03期
8 曹成涛;徐建闽;;单交叉口交通多目标控制方法[J];计算机工程与应用;2010年16期
9 慈玉生;吴丽娜;裴玉龙;凌贤长;;快速路入口匝道连接段通行能力间隙接受模型[J];交通运输系统工程与信息;2009年04期
10 刘有军;曹珊;;基于元胞自动机的强制换道模型研究[J];交通信息与安全;2009年03期
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