Lanzhou City Transportation Decision Support System

Lanzhou is the importent industrial center in the Northwest. With the development of urban society and economy, traffic problem is becoming more serious. Under such situation, it need establish a developing strategy for city communications and transportation. During the course of urban transportation planning, analysis results are produced using kinds of methods based on a great deal of data, which brings a great deal of complex data. It is important to manager and dispose these data by manpower. Decision support system on transportation planning provide necessary technical support for transportation planning, and it is indispensable tool of correlation analysis and decision, through the manner of information processing and managing, simulation analysis. Because analysis model supported by decision support system on transportation planning is related to the characteristic of the planned object, and related to the practical conditions. Foreign software are not adapted to our country's condition. So we need develop adaptable decision support system on transportation planning according to the situation of our country and the characteristic of Lanzhou.This thesis put forward the unitary project on the decision support system on transportation planning of Lanzhou based on the current transportation conditions and the method of transportation planning. Jobs in this paper are showed as flowing:Firstly according to the transportation survey in Lanzhou in 1999 and in 2000,including person trip survey, number of passengers alighting/boarding survey, loadway flow survey, exit flow survey, and so on, based databank managing system is established, which can save, inquire and maintain interrelated information and extract data from kinds of informational resource by any means.And then, four-phase model is established. We predict the future traffic attraction of each transportation zones and establish traffic attraction forecasting model by analogizing and analyzing, predict the future trips times between two transportation zones and establish transportation distribution forecasting model by gravity model, predict the future trips times between two transportation zones in different traffic ways and establish transportation ways forecasting model, and distribute the traffic flow by the shortest route arithmetic.Finally, the model base on the decision support system on transportation planning of Lanzhou is established in Visual Basic language.