基于交通瓶颈的动态交通分配模型

在动态交通分配模型中,假定在交通均衡状态下司机不可以通过改变出发时间和行驶路径而降低出行费用.经典的Vickrey模型作为一种基于交通瓶颈的动态交通分配模型,假设出行者选择不同的时间上班(下班)所面对的出行费用(含旅行时间和延误惩罚)相等.针对在Vickrey模型中,长期以来人们均假设瓶颈的通行能力是不变的,即从瓶颈离开的累计车辆数为直线,将对Vickrey模型的这一缺陷做出改进,建立瓶颈通行能力随时间变化时的交通均衡模型和求解算法.

A Model of Dynamic Traffic Assignment Based on Traffic Bottleneck with Varying Capacity

In the models of dynamic traffic assignment,it is assumed that travelers cannot reduce their travel cost by unilaterally changing the departure time and route choices.As a traffic bottleneck based dynamic traffic assignment model,the classical Vickrey model states that commuters face the same travel cost(including travel time and schedule delay cost) in choosing different departure time.It has been assumed in the Vickrey model that the capacity of the bottleneck does not vary with clock time,namely the departure curve from the bottleneck is a straight line.In this paper,this deficiency of the Vickrey model is improved by establishing the equilibrium traffic pattern considering time-varying bottleneck capacity.