关键词: 公交线路优化；换乘系数；公交站点；公交站距；乘客需求

Abstract: With the continuous improvement of China's economic development level, the pressure of transportation in various cities is rising. It is a priority to develop the urban public transport system and study the optimization of the bus routes. In this study, based on the data of existing bus lines and stations in qilihe district, lanzhou city, a bus line optimization model is established, aiming to reduce the travel time and the transfer times of passengers. The restrictions of route length, route non-linear coefficient, route repetition coefficient, transfer coefficient and station distance are selected as constraints. According to the final research results, the optimization measures for the existing bus lines and stations in qilihe district of lanzhou city are put forward. The suggestions are to extend 10 short routes and remove the bus stations with small spacing.

Key words: Bus route optimization; Transfer coefficient; Bus stations; Bus station distance; Passenger demand