基于不同安全间距的元胞自动机交通流模型的研究  

Study on cellular automaton model of traffic flow based on different safety distance

作　　者：梁文家[1] 关可[2] 吴潜蛟[2] 盛春[2] 

机构地区：[1]长安大学电子与控制工程学院,陕西西安710064 [2]长安大学信息工程学院,陕西西安710064

出　　处：《电子设计工程》2012年第7期1-4,共4页Electronic Design Engineering

基　　金：陕西省2009年自然科学基金项目(2009JM8011)

摘　　要：文中在NaSch模型的基础上提出一个改进的元胞自动机模型来模拟周期性边界条件下高速公路上车流运动。考虑到不同速度应有不同的安全车间距、反应时间和减速距离,根据车辆与前方紧邻车辆之间的间距和车辆的速度来确定该车的运动,这样就可以间接地反映出前方紧邻车辆对当前车辆的影响。通过引入不同的安全间距可以描述不同速度运动的车辆接近前方车辆时的减速行为。由于不同的安全车间距的引入,并且考虑到速度的差异,因而可以较好地描述交通流中的不同现象,可以对车辆微观运动进行合理地描述。An improved CA model was proposed to describe the highway traffic under the periodic boundary conditions on the basis of NaSch model.Considering the different speed with the different safety distance,reaction time and deceleration distance,this model claims that the motion of a vehicle at one time step depends on both its headway and the speed of the vehicle,thus including indirectly the influence of its neighboring vehicle.In addition,the different safety distance was introduced to descript the deceleration behavior of vehicles with different speeds.Since the different safety distance was introduced into this model and differences of speeds were taken into account,this model gives a better description of the phenomena observed in the traffic flow and gives a reasonable depiction of the motion of a single vehicle.

关 键 词：元胞自动机模型 交通流模型 NaSch模型 安全车间距 速度的差异 

分 类 号：U492.84[交通运输工程—交通运输规划与管理]