| The development of economy accelerates the process of Urbanization in China and increases the total number of motor vehicle, so the traffic demand increases sharply . Some measures should be taken to deal with the serious traffic jam now. Nowadays in our country most of the traffic jam occur at the intersection, which takes nearly 70% of the whole traveling time. Therefore, it is very important to improve the traffic organization at intersections.In Chapter 2, we change the traditional form of city road network into the dual graph of city road network based on the dual graph of graph theory. The traditional form of section is converted to points and arc expresses turn penalties. In this new network we are intuitive to see the crossing in different directions of city road network. After analyzing the extend storage structure of road network, we choose this efficient way to represent network.In Chapter 3, we gives a specific analysis of urban road resistance function. After compared with existing famous models such as HCM model, a improvement delay model is put forward. The model is modified and parameters are estimated by simulated data. The structure of search node is defined in the sight of dual graph theory as a solution of turn prohibitions and delays in road intersections.In Chapter 4, we designs and implements a urban network information fusion and application system based on many technologies such as java, oracle et al. Then we choose Beijing as a study area and combines the traffic data to validate correctness and effectiveness of relatively technical scheme. |
