摘要
城市协调控制主干路交通流模型是交通预测、仿真、信号配时的前提和基础.论文通过改进开放性边界条件,利用一维元胞自动机模型模拟协调控制主干路交通流状况.该模型采用差分方程的形式描述车辆动态行为.解除了信号灯等间距布设的限制,每个路口的信号灯可以根据交通流变化选择绿信比,相邻交叉口采用绿波控制方式调整相位差.论文利用MATLAB软件对模型进行仿真,分析了驶入主干路流量以及干、支路的转弯流量对于主干路平均速度、平均密度和平均流量的影响.在仿真结果的基础上,提出了相应的控制措施改善主干路交通状况.
Mathematical model of traffic flow on arteries with coordinated control system is a prerequisite for traffic forecasting,simulating and signal timing.A one-dimensional cellular automaton-model with improved open boundary conditions is used to simulate the traffic flow on arterial roads with coordinated control system.The model employs difference equations to describe dynamic behaviors of vehicles.The restriction on regularly spaced distribution of traffic signal lamps can be eliminated.Furthermore,the green-signal-ratio on every intersection can be chosen according to traffic flow fluctuations.The phase difference between adjacent intersections can be adjusted by green wave control.MATLAB is employed to simulate this model to analyze the impacts on mean velocity,density and volume of arterial traffic flow by the flow volume on the artery and the turning flow volumes from branches.Based on the results of simulation,a series of proposals for improving the arterial traffic situations are put forward.
出处
《控制理论与应用》
EI
CAS
CSCD
北大核心
2011年第11期1679-1684,共6页
Control Theory & Applications
基金
国家自然科学基金资助项目(60674062)
教育部高等学校博士学科点专项科研基金资助项目(20060422054)
山东省自然科学基金资助项目(ZR2009GM032)
山东大学自主创新基金资助项目(2009TS046)
关键词
交通流
元胞自动机
主干路
协调控制
开放性边界
traffic flow
cellular automaton
artery
coordinate control
open boundary
