方式划分与路网配流联合模型

Combined Model of Modal Split and Assignment

利用方式划分和交通分配联合模型将公交OD在轨道交通和普通公交路网形成的广义路网上进行分配.构造了广义旅行费用函数,利用惩罚系数模拟乘客的心理行为,改进了BPR路段经验阻抗函数,对公交的拥挤条件进行描述,讨论乘客平均等车时间.基于广义旅行费用在广义公交路网上提出了满足用户平衡(UE)的方式划分与交通分配的联合模型和多路径增量分配法来近似模拟用户平衡状态的分配算法,提高了分配算法的效率.并给出简单的算例说明该联合模型能够实时地反映公交线路的实际客流量对旅行时间以及公交服务水平的影响.

Traffic flow can be assigned on the generalized nets which include urban rail traffic nets and common bus nets, with the combined model of the modal split and traffic assignment. The authors put emphasis on description of the formation of generalized trip cost function and penalty coefficient and the average time of waiting for bus, and improve the link travel time function （BPR）. The combined model for modal split and traffic assignment is put forward based on the generalized trip cost on the generalized nets, which satisfies user equilibrium. A multi-rails incremental algorithm simulates user equilibrium condition is proposed in order to increase the efficiency of algorithm, and a simple numerical example is presented. The combined model can real-timely show the relation between passenger flow of the road and trip time and quality of the public server.