The article introduces the present situation of the highway urbanization in Sunan region in recent years,introduces the new clauses and measures in the highway industrial technical standard, analyzes the division of road functions and the defect of industrial management in China,and puts forward the integrating issue of some indexes.

The index system consists of classification of highway,urban action of highway and water conse.

The future policies on the urbanization path of China should be helpful to break the confining line between urban area and rural area.

The article considers the proposal about taking an urbanization path with Chinese characteristics speeding up our country s urbanization, which was put forward in the report to the 16th National Congress of Communist Party of China, has a very significant practical meaning and profound historic meaning in building a well-off society in all-round way and realizing the modernization.

Analyzing the characteristic of dualn-uclei mode,which is a sort of urban space structure,analyzing the urban highway network plan requirement of dual-nuclei mode,based on the node important degree,this paper set up the method of best scale to plan the urban highway network layout.