Urban Road Network Characteristics Analysis And Model Research

Urban road network is the product of urban development in the process of urban development.Different cities have different forms of urban road network.With the opening of the 19 th century,China will usher in a higher quality urbanization process,and the city needs more reasonable road network planning.On the city road network structure and the research more and more important in the evolution of urban road network,this paper will be based on the basis of the different urban road network,the analysis of characteristics of urban road network,and build roads network static model and dynamic growth model.In this paper,we study the urban road network to the original method to establish a network diagram,relying on the ArcMap based on geographic information system platform,urban road network at home and abroad,vector quantization and from two aspects: geometric features and complex network to reveal the characteristics of urban road network.Different cities have similar characteristics in geometrical structure,but due to the objective physical constraints in the urban road network,their geometrical features are different.But from the point of view of complex network,the urban road network shows a certain small world characteristic and no scale characteristic.Is put forward and verify the city road network between minimum sp anning tree and triangulation,at the same time,according to the current network features a static city road network model is put forward,the model to explain the formation mechanism of urban road network from the structure,it is concluded that the result of good similarity with the real road network.All the above studies analyzed the urban road network in a static way.In order to explore the general evolution law of urban traffic network,the paper explores the threshold value of urban road network structure and further describes the mechanism of urban road network formation.At last,based on the principle of leaf vein growth,this paper studies the characteristics of urban road network evolution from the perspective of dynamic growth.The dynamic process of urban road network evolution is explained by improving the vein growth model.The improvement of the road network growth rules in the leaf vein growth model is a description of the difference between self-organization and planning characteristics.The addition of natural geographical phenomena explains the obstacles of natural phenomena in the process of road growth.Moreover,the evolution process of road weight is added to make the urban road network have different road grade.It has come to the conclusion that planning is the way to link the scattered sections of the urban road network,thus the higher the weight of the road.This paper summarizes the current internal structure characteristics of the urban road network and the characteristics of complex network,and puts forward two kinds of model reveals the observed evolution mechanism of urban road network inner structure,summarizes the quantitative relationship of the attributes of urban road network,from the organization and planning law,the conclusion of the current road network planning,especially in road planning and reform has very important significance,the development of the super large urban traffic network to provide decision support.