考虑交通诱导下新进出行者的网络交通流演化模型

Network traffic flow evolutionary model considering new origin-destination demand under traffic guidance

研究了城市网络交通流的动态演化行为.在网络交通流的演化过程中,出行者根据路网状况不断调整自己的出行路径,假设OD对出行需求和路径流量受到OD对出行成本的影响,考虑在交通诱导下新进出行者的路径选择方式,以Logit分配模型表示新进出行者选择出行路径的比例,提出一个改进的交通流演化模型,并分析了该模型及其零点的一些特性,它能更好地反映现实中交通流演化结果.数值实验结果表明,模型可近似描述交通流演化到用户均衡态的过程,交通流能够收敛到均衡状态.

The paper investigates the dynamical behavior of urban network traffic flow.In the evolution process of traffic flow in the urban network,travelers adjust the day-to-day route choice.Assuming that origin-destination（OD） demand and path flow are influenced by the OD travel costs,considering the route choice mode of new travelers under traffic guidance,a modified discrete traffic flow evolution model is proposed.The final traffic flow state as the fixed point of the model is analysed.The model can better formulate the adjustment process of traffic flow.Finally,a numerical example demonstrates the stability of the model.