基于元胞自动机模型的高架路交织区交通流的研究  

Study on the traffic flow of weaving section in elevated road system with cellular automaton model

作　　者：雷丽[1] 董力耘[2] 宋涛[2] 戴世强[2] 

机构地区：[1]山东大学能源与动力工程学院,济南250061 [2]上海大学上海市应用数学和力学研究所,上海200072

出　　处：《物理学报》2006年第4期1711-1717,共7页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10202012;10532060);高等学校博士学科点专项科研基金(批准号:20040280014)资助的课题.

摘　　要：高架道路上的交织区时常成为交通瓶颈.以Nagel和Schreckenberg提出的NS元胞自动机交通流模型为基础,考虑到换道因素,对高架路主线为单车道时的交织区路段进行了数值模拟和分析.结果表明:当交通流稀疏时,车流的交织行为对系统影响不大,即使加大交织区长度,整个系统的交通流参数也变化不大;当交通流拥挤时,交织行为会对系统产生不良影响,此时加大交织区长度,可以改善整个系统的交通流状况.模拟结果显示,交织区长度并非越大越好,工程设计中选取一个适宜的中间值,整个系统就可以获得很好的运行效果.The weaving sections often turn into the bottleneck on the elevated wads. On the basis of the NS cellular automaton traffic model, the weaving section with one-lane main road was simulated and analyzed. For the free traffic flow, weaving almost has no influence on the system, even with increased weaving length. On the other hand, when the traffic flow is in congested state, weaving conflicts have negative effects on the system. The traffic condition will be improved with the increase of weaving length. Our simulation results suggest that the length of weaving sections need not to be inappropriately increased, and a proper moderate value should be chosen to get an optimal traffic condition.

关 键 词：交通流 元胞自动机模型 高架路 交织区 

分 类 号：U491.112[交通运输工程—交通运输规划与管理] U412.373.2[交通运输工程—道路与铁道工程]