Large And Medium-sized Cities In China, The Road Network System Architecture

Urban road network system is a major part of transportation facilities. The scientificity of its network grade proportion and its layout ,the specificity of its functions immediately decide whether it can meet social and economic development, whether the urban traffic system could work efficiently as a whole, whether its layout can maximize social and economic benefit, and whether it can ensure the safety of pedestrian and vehicles.As the backbone of the urban traffic system,urban road network system will restrict the development of the former.In China,the non-scientificity of its network proportion and the non-specificity of its functions is a striking problem, but the current study of urban road network pays little attention to them. Instead, the focus is being on the structure of the network's function. Therefore, this paper started with analysis of road network system's features, and makes a qualitative analysis of road network system's function, and then makes a qualitative and quantitative analysis of the grading structure and layout of the urban road-network system.The opinions prove valuable in practice by taking urban-road-network system planning of ShaoYang City as a study case, and points out its weaknesses and makes corrective suggestions.Finally, the paper shows a tripartite relation between function construction, grading construction and layout construction in large to medium cities in China.