多用户动态交通分配和信号优化的组合研究

Combined multi-user dynamic traffic assignment and signal optimization

提出了一种饱和路网中考虑多用户行为下的动态交通分配和交通信号优化的组合模型。模型采用广义双层规划来表示。模型的上层是信号控制优化,下层是考虑多用户路径选择条件下的动态交通分配,进行交通网络流的配置。同时,模型中采用具有物理排队的动态网络模型,从而考虑了饱和路网中物理排队对基于路段的网络条件的影响。通过仿真说明了饱和路网中考虑多用户行为下的动态交通分配和交通信号优化的组合模型可以实现交通信号的优化配置和交通网络流的优化,并反映了排队的物理效应。

This paper presents a combined model on multi-user dynamic traffic assignment and traffic signal optimization in saturated networks.The model is formulated as a generalized bi-level programming problem.The upper-level problem optimizes signal settings,while the lower-level represents a multi-user dynamic traffic assignment problem,which sets network traffic flow.Meanwhile,the model applies physical-queue dynamic network model,which considers the impact of physical-queue on the link-based network conditions in saturated networks.The simulation results show the model can realize the optimization of the intersection traffic signal settings and optimize network traffic flow,and reflect the physical effects of queuing.