Statistics Analysis on the Relationship of Highway Net Density with Population Density and Per Capita GNP in National Region

The relationship of the highway net densitywith the population density and per capita GNP in a national region is analyzed by use of the section data of three different times, and it is found that among them there exists a stable mathematical relation and a statistics law. Considering that the highway net building is influenced by the industrial structure of resources, the highway net construction policies and the other transport patterns, a concept of highway dependence-favoritism index is put forward, which is used to explain the variation between the actually obtained highway net densities and the values obtained by model calculation. This study can afford a fundamental theory for the harmony development of national highway network, population and economy.