Planning indices system of urban road network;

Analytical techniques about the supply and demand of urban road network;

This paper introduces a new algorithm to get the shortest path between two points in urban road network,based on the geographic characteristic of the road network.

The objectives of city road network planning and shortcomings of the available programming models were analyzed.

According to the characteristics of city road,the author has studied and tested some key techniques of shortest path analysis of city road network,according to the characteristics of city road network and put forward a practical and e.

Calculation of urban road network density based on RS and GIS

Basic contents of road network planning are expounded from three aspects of road category scale, road network density and road network shape.

A new mathematic model for urban road network capacity was designed,which both incarnated the transportation characteristics of road network and synthetically considered the service level of road network,traffic affection of environment,and so on.

Small world model provides a new aspect and method for exploring the topological structure and intrinsic characters of urban road network.

So,the researching results of the theory are unsuitable for urban road network.

The delay at nodes is considered in the equilibrium assignment model special for urban road network, which is closer to the real case of urban road network and better than other common assignment models.