The Research About Transit Planning Passenger OD Data Generator

With the rapid expansion of urban construction and the growth of urban population, urban public transit becomes the key to the urban development and the comfortable living. Good public transit system can ease the pressure on urban traffic significantly and public transit t plays the role of the dredge the meridians for the city’s comprehensive development. Both large cities and small cities under construction are active in construction, improve and optimize the public transit network. Optimization of urban public transit networks is an important issue to improve urban public traffic.From the experience method to the mathematical optimization method, optimization of urban public transit networks has gone through numerous developments and replace. With the support of powerful computing capabilities in contemporary computer, the application of mathematical knowledge to analyze the public transportation network optimization problems becomes the mainstream. All these methods use the data model of OD matrix. As an ideal input, OD matrix occupies an important position in the public transit network optimization. However, data of OD matrix is acquired by investigation and scientific processing. This paper based on the integrated acquisition of public transit traffic OD matrix, so that it can lay an important foundation for the public transit network optimization.OD Matrix has variety of data investigate methods.Different city size, number of investigators and precision of result will make different outcomes so the choice of methods is a balance of all aspects. This paper focuses on investigate methods based on small cities and few investigative resources. Using mathematical statistics, especially the knowledge of sampling theory, it analyzes the feasibility, reliability, efficiency and cost. This paper did some example analysis combining with the Yuxibus OD investigations, innovation in a multi-stage sampling survey method, followed by reasonable sampling time, the vehicle, passengers and designed a questionnaire corresponding to the sampling method. At the same time, it proved the superiority of this method in practical applications. And then it also used the statistical principles to conduct a detailed statistical analysis of the survey data. First of all, in connection with the data quality, this paper designed appropriate interpolation method and discussed the influence of the research error on the data results. Then it predicted and analyzed the data, heuristic to combine the part of the OD data by using the sample survey method with the traffic data, predicted all data with sampling expansion method and got the OD matrix data completely which can be good to input as a optimized route net. Finally, it output the OD matrix results combining with the project in Yuxi.Supported by sampling theory, the investigate methods and data processing method in this paper are practical and inspiring. Connection of multi-step method is clear and reasonable, and a satisfactory result is obtained.