考虑级联失效影响的城市道路网络容量研究

发布时间：2018-10-22 16:08

【摘要】：城市道路交通网络中,交通拥挤的传播会引起路网容量发生变化,同时,交叉口或路段容量的变化亦将影响拥挤传播的后果。因此,构建考虑拥挤传播影响的路网容量双层规划模型,下层模型为刻画城市道路交通网络拥挤传播过程的级联失效模型,上层模型确定一定服务水平下路网能承担的最大交通需求(即路网容量),其中路网服务水平根据路网阻塞程度评定。然后,基于迭代优化设计双层规划模型的启发式求解算法。最后,将该双层规划模型应用于一个简单的双层城市道路交通网络(上层为出行网络,下层为道路网络)中进行仿真试验,比较发现:1级联失效,也就是拥挤传播对路网容量有一定影响,且路网服务水平越低,对路网容量的影响越显著;2上层出行网络结构对道路网络容量存在影响,出行结构不同,路网容量不同。
[Abstract]:In the urban road traffic network, the traffic congestion will cause the change of road network capacity, at the same time, the change of intersection or section capacity will also affect the consequences of congestion propagation. Therefore, a network capacity bilevel programming model considering the influence of congestion propagation is constructed, and the lower layer model is a cascade failure model to describe the congestion propagation process of urban road traffic network. The upper model determines the maximum traffic demand (i.e. road network capacity) under a certain service level, in which the network service level is assessed according to the degree of road network congestion. Then, a heuristic algorithm based on iterative optimization for bilevel programming model is proposed. Finally, the bilevel programming model is applied to a simple double-layer urban road traffic network (upper layer is trip network, lower layer is road network). That is, congestion propagation has a certain impact on road network capacity, and the lower the network service level, the more significant the impact on road network capacity; 2 the upper travel network structure has an impact on road network capacity, travel structure is different, road network capacity is different.
【作者单位】：长沙理工大学;
【基金】：国家自然科学基金(51278068) 国家自然科学基金重点项目(51338002)
【分类号】：U491

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