几种随机相互作用势相关的交通流模型比较

COMPARISON OF SEVERAL INTERACTIONAL POTENTIAL RELATED TRAFFIC FLOWMODELS

为了研究随机因素对交通流的影响,人们提出了几种考虑顾前相互作用势的交通流模型.它们均基于简单非对称排斥过程和微观动力学模型,对于描述交通流的随机演化行为具有优越性.本文对几种势相关的交通流模型进行比较,特别是比较不同模型的车辆状态迁移的概率计算机制;进而通过数值仿真,比较不同模型刻画的随机演化现象.通过本文的比较,得到几种随机相互作用势相关的交通流模型的流量-密度图、时空斑图以及三维演化结果.为进一步优化势函数结构,建立符合实际交通的随机交通流模型奠定基础.

In order to study the influence of random factors on traffic flow, several traffic flow models considering the interaction potential are proposed. They are developed based on the simple asymmetric exclusion process and the microscopic dynamic model, and show the advantage of describing the stochastic evolution of traffic flow. Several interaction potential related traffic flow models are also compared in this paper. Especially, the computing mechanism of the vehicle state transition probability in different models are compared. Moreover, the stochastic evolutionary phenomena described in different models are compared by means of numerical simulation. The flow density diagram, spatiotemporal patterns and three-dimensional evolution results of these models are then obtained by the comparison in this paper. These results provide the foundation on further potential function optimization and the establishment of stochastic traffic flow models in accordance with actual traffic.