论文部分内容阅读
分析了路段和节点的流量传播过程与离散的瞬时动态用户最优路径选择均衡条件,建立了反应型的动态用户均衡网络交通流模型,设计了对角化的启发式算法求解模型,评价了动态化的道路网络脆弱性指数。分析结果表明:在自由流速度为40km·h-1、堵塞密度为125veh·km-1的9节点12路段构成的算例路网中,在时刻3路段1受损时,路段3在高峰时的车辆数量从原有的50veh增加到了100veh,入口流量增加1倍,路段2的入口流量降为0;在路段3、6、7和10构成的路径上,路段1受损使得此路径的车辆数将近增加1倍,车辆数量的增加导致各路段的阻抗增加。提出的方法能刻画车辆绕开受损路段的交通流传播过程,能有效辨识道路网络在各个路段各个时刻的脆弱性。
This paper analyzes the traffic propagation process of nodes and nodes and the optimal equilibrium conditions for discrete dynamic user optimal path selection. A reactive dynamic balanced network traffic model is established and a diagonalized heuristic algorithm is proposed to solve the dynamic model The road network vulnerability index. The analysis results show that in the case of 9-node-12 road network with a free-flow velocity of 40 km · h-1 and a congestion density of 125 veh · km-1, when road 1 is damaged at time 3, Increased from 50veh to 100veh, the traffic volume in entrances doubled, and the traffic flow in section 2 dropped to 0. On the section consisting of sections 3, 6, 7 and 10, the section 1 was damaged, so that the vehicles in this section The number of nearly doubled, the increase in the number of vehicles led to an increase in the impedance of the various sections. The proposed method can characterize the traffic flow of vehicles bypassing the damaged section, and can effectively identify the vulnerability of the road network at each moment of each section.