Mode split model under different public transit fare

Subways and buses are two primary modes of the public transit system. In order to decide the reasonable price ratio of the subways and the buses, the effects of fare on traffic structure is studied in this paper. Questionnaire investigations of public traffic mode split were done in Beijing. Influencing factors of selecting subways and buses were analyzed. The results show that trip time, cost, gender, age, occupation, income, and trip intention have remarkable influences on the results of trip mode split. On the basis of combination of variable factors, the variables that should be used in the model were determined and the model of public traffic mode split based on disaggregate model is given in this paper. The relationship between fare and mode split is studied, which provided a base for adjusting the structure of public traffic by using the fare policy. Subways and buses are the primary compositions of the city public transit system; however, in big cities, the passenger flow split is always unreasonable between subways and routine buses. According to the questionnaire investigations of subways and buses routes split in Beijing, a split modal is given in this paper. It provided a tool for using traffic policy to adjusting the structure of public transit system.