关键词: 城市交通, 可达性, 两阶段机会模型, 公交出行, 公交线路

Abstract:

Accessibility is an effective indicator to evaluate the convenience of transportation. Urban public transport with better accessibility can attract more people to travel in this way. Based on the multi-source data set, such as bus smart card data, departure time interval data, etc., together with the influence of lines on travel time, a station waiting time calculation method considering bus lines and traffic flows was proposed. Meanwhile, the travel time between the departure and terminal stations was obtained by using the transfer time threshold to link travel data. Then, a two- stage opportunity model was established. Taking Beijing as an example, the actual accessibility of the bus network was evaluated. The results show that the station service accessibility and network accessibility are both remain relatively high levels in the city center and relatively low levels in the suburbs, with a distinct variation trend along the subway lines. Specifically, stations with more lines have higher levels of accessibility, yet the traditional fixed value method is more likely to underestimate the accessibility of high-level accessibility stations, which verifies the effectiveness of the proposed method.

Key words: urban traffic, accessibility, two-stage opportunity model, bus trip, bus lines