Study On Accessibility Of Urban Public Transit

Bus priority is an important way to solve the problem of urban traffic congestion,and a large amount of data is accumulated in the process of running the urban public transport system.Thus,it provides a basis for the planning,management and operation of public transport.Based on the bus IC card data,the subway operation data and the basic data of bus and subway,we can get the transit time through the processing,analyzing and matching of these data.It provides supports for accessibility calculation based on the determination of arrival time.Firstly,this paper introduces the analysis method of the public traffic data source and two different data preprocessing methods based on the bus IC card data and the subway operation data.Based on the data mining and processing,the bus station and the subway station time-table was established based on the data.At last,the integration of public traffic station arrival schedule was established.Based on the definition of public transport trip chain,accessibility model was built through extraction of public transport patterns,travel period and transfer point,each stage of the travel time and accessibility calculation.The shortest time from the research center to all public transport sites in the study area was calculated by the Depth-First algorithm.Finally,the results of the model calculation are verified by the experimental data.The experimental results show that the model has good accuracy.According to the above research,this paper takes Beijing as an example.The study area is within 6 rings.The accessibility of public traffic in Beijing during the morning and evening peak and non-peak period are demonstrated and analyzed by using the isochronous and accessibility coverage map.