Research And Application Of Urban Traffic Geographical Information Integrated Management System

With the rapid development of urban economy, the scale of urban traffic system is larger and larger, but its unobstructed ability still cannot satisfy the transportation need increasingly, the traffic problems like traffic congestion and traffic accidents are more and more serious, it has become an important topic in the field of transportation that how to manage and optimize the urban traffic system scientificly and effectively in the condition of limited road resource, so as to solve the traffic problems. From the point of view of intelligent transportation system (ITS), it can solve the urban traffic problems to a certain extent through constructing the Urban Transportation Geographic Information Integrated Management System to manage the traffic information effectively and provide scientific traffic assistant-decision supports. Therefore, this thesis designs and develops the urban transportation geographic information integrated system based on the advanced database, GIS and traffic control technologys, that this system realizes the integrated management of huge amount of urban traffic information and provides some important traffic assistant-decision functions.Based on the demand analysis of the urban traffic geographic information integrated management system, the integrated management system is divided into the traffic fundamental geographic information subsystem and the traffic thematic geographic information subsystem. The integraton system is programming relized, by using Visual C#.net programming language, ArcGIS Engine components package, geographical spatial database of ArcGIS and SQL Server2005. Compared with the existing urban traffic geographic information systems, our system accomplishes the integration of the urban traffic management and traffic assistant-decision supports, which is advanced to some extent. The main research contents and achievements of the thesis is depicted as follows:1. According to the needs of management and operation of the urban traffic system, from the point of view of traffic assistant-decision service, we discuss the key technical problems of the urban traffic geographic information integrated system, like dynamic traffic guidance, public transit network transfer and network optimization, and so on, which are detailed in theory and implimentation process;2. Based on the needs and the key technical problems of the urban traffic geographic information integrated system, designing the function framework and the detailed functions of the system, refining the function modules step by step, the funcitons which are defined and described perfectly from the process, the function, the organization and the information four aspects, and mainly dissertate the assistant-decision functions in the traffic thematic geographic information subsystem;3. Constructing the spatial database and attribute database apply to the management of urban traffic network and relizing the global management of the data layer, the logic layer and the application layer, based on ComGIS technology;4. With ArcGIS platform and Visual C#.Net programming language, the urban traffic geographic information integrated system is developed based on ComGIS technology, that the system relizes the visualization of the urban road network and other traffic information, the inquiring and statistical analysis of traffic data, the simulation and data analysis of several traffic flow models, the inquiring and optimization of the public transit network, dynamic traffic guidance, and so on, which provide the data and decision supports for transportation management department and other users.