Study On The Coordination Degree Of City Traffic Investment Structure And Traffic Demand

Beijing has started the research to optimize city traffic structure since the tenth five year plan, in order to solve traffic congestion by changing people's traffic modes. In the past ten years, a great deal traffic investment was put on road construction, which did not turn the condition that the contradiction between traffic demand and traffic supply is more and more serious. Because of a lag in public traffic investment, there is no better service level of public traffic, and no attraction compared with cars. It is hard to adjust traffic modes. Therefore, it has means to discuss traffic investment direction and scale infection to traffic structure.First, the paper looks back Beijing traffic evolvement in the past a hundred years, and uses traffic policies of foreign big cities for reference to qualitatively analyze Beijing traffic investment direction in the near future. Then, paper applied harmony degree theory to analyses harmony relationships of Beijing traffic investment with traffic supply, traffic demand and social and economic subsystem, and to get the harmony degree between traffic investment and traffic structure quantitatively in the past twenty years. Based on the harmony relationships, we can rectify Beijing traffic investment structure.At last, based on annals data, we applied multi-objective optimize method to discuss the proportions that Beijing traffic investment account for GDP and infrastructure investment in the near future, by Matlab software. We gained the conclusions that Beijing traffic investment should be inclined to track traffic which is big capability and speedy, and Beijing should increase investment on ground routine public traffic and public security traffic management to realize the eleventh five-year traffic aim, and to gain a harmonious and continuable development of traffic investment structure and traffic demand.