基于CA模型的单车道交通流仿真的研究  

The Study of the Traffic Flow Simulation in One Lane Based on the CA Modal

作　　者：张奎[1] 方美琪[1] 翟润平[1] 

机构地区：[1]中国人民大学信息学院,北京100872

出　　处：《交通运输系统工程与信息》2006年第4期81-85,共5页Journal of Transportation Systems Engineering and Information Technology

摘　　要：在Negel-Schreken berg单车道元胞自动机交通流模型的基础上,考虑面向高速公路的一维交通流运行状况,细化格点并进行计算机仿真.观测车辆的运行情况,并对车辆的平均速度和延误加以研究.仿真结果表明,车辆平均速度和延误符合它们的基本变化趋势.从仿真结果生成的时空图上我们可以看出,本文模型所生成的时空图所出现的阻塞相要比NS模型所出现的阻塞相平缓.且由于我们在仿真过程中使车辆加速度降低到合理的大小,让车辆的运行过程更加连续,因此本文模型比NS模型更加贴近现实.Based on Negel-Schreken berg＇s cellular automaton（CA） of traffic flow in one lane, taking the running situation which is oriented to freeway into consideration, making the grid more small, we do computer simulation. We make a observation of the running condition and consider the mean velocity and the delay of vehicles. The result of simulation indicated that the mean velocity and the delay of vehicles is similar to their fundamental tendency of variation. We can perceived from the time-space diagram,that the jam phase which is generated by this method is more gentle than the jam phase generated by the NS modal. Because we lower the accelerated velocity to a more rational value and make the procedure of running more continuous in the simulation, we can say, that our modal is approach the reality more than the NS modal.

关 键 词：元胞自动机 加速度 离散程度 阻塞相 运动相 

分 类 号：U491[交通运输工程—交通运输规划与管理]