复杂城市交通网络上的交通阻塞和流量分布特性

Congestion and load distribution in complex urban traffic networks

基于用户均衡配流模型,分别研究了4种类型城市交通网络,即规则网络、随机网络、小世界网络和无标度网络上的复杂交通行为。在用户均衡配流模型中,采用传统的BPR函数作为路段阻抗函数,并侧重分析了该函数中两种不同形式的实际容限的情况。为了刻画网络上的交通阻塞,探讨了流量和实际容限比值大于1的边的比例与交通需求之间的关系。最后,讨论了上述4种城市交通网络上的流量分布特性。

Based on user equilibrium,the complex traffic behaviors in regular networks,random networks,small-world networks and scale-free networks were investigated.Within user equilibrium,BPR function was used as link cost function,and two types of link's practical capacity which is a parameter in the BPR function were analyzed in detail.In order to describe the congestion of the network,the relationship between the rate of links whose load is larger than its practical capacity and traffic demand was studied.Finally,the load distribution in the above four urban traffic networks were discussed.