城市群道路网络上交通流的演化分析

Traffic Flow Evolutionary Analysis of Urban Agglomeration Road Networks

为了研究城市群道路网络对其交通流演化的影响,本文建立了城市群道路网络的交通流演化模型.使用Matlab7.0仿真了在不同概率条件下增加道路的城市群道路网络上交通流演化,并对其交通流演化结果比较分析.得到以下结论:(1)城市群交通流受城市相互作用的影响,城市群城市交通流向相邻城市方向的城市边缘集中;(2)城市群道路网络变化对城市群交通流分布有一定的影响,但是对城市群的道路网上的交通流分布整体趋势影响较小;(3)城市群以不同概率增加道路,道路网络上的交通流演化都出现等级涌现现象.

To analyze traffic flow on urban agglomerations road network,the paper designed the model of traffic flow evolution for urban agglomerations.It simulated traffic flow evolution with deferent probability of road network by Matlab7.0,and made comparisons of the traffic flow evolutions.The results indicate：（1） the traffic flow on the road network of urban agglomerations is impacted by the interaction among cities,and the traffic flow concentrates to the edge of adjacent city; （2） the diversification of urban agglomerations road network affects distribution of traffic flow,but it has less effects on the whole distribution of traffic flow; （3） the emergence of hierarchy exist in the evolution of traffic flow on the deferent probability of road network of urban agglomerations.