Research On Simulation And Evaluation Technology Of Megapolis' Transit Network Based On Complexity Analysis

With the rapid development of megapolis' economy, the imbalance between mechanical growth rate and natural growth rate of urban population becomes serious. And the limits of city's public resources make urban traffic even worse. So this paper values and analyses the traffic line and network, proceeding with the complexity modeling of megapolis' transit network. There are two reasons to use this method. One is that the core of megapolis' transit network is a structure combined by transit lines and transit system.. The other reason is the particularity of transit network's exterior environment and the complexity of transit network's intramural environment.Transit Network is a Open and Complicated Macro-system, which is contacted with urban traffic system and social economic system. The research on the Complex System Theory and Complex Networks Theory is a hot topic in the field of system engineering. This paper builds up a Simulation Model for transit network of Beijing, combined the complex modeling of megapolis' transit network and GIS-T technique. Based on the research, this paper gets the theory, the flow of application and methods of the key technology of urban transit network planning. Finally, this paper uses a construction project to analyze the transit networks of Beijing. We get lots of Results of Qualitative and Quantitative Analyses, and make suggestions for Beijing's transit networks planning. All these suggestions have a great effect on the planning.