Algorithm for origin-destination matrix estimation of mutil-mode network bus route

In order to analyze the impact of urban rail transit on the travel mode choice of conventional bus passengers, an algorithm for origin-destination matrix estimation of conventional bus passenger flow under the impact of urban rail transit was developed in MATLAB by using Dijkstra's algorithm to calculate the path with shortest travel time, where the minimum travel time was taken as the objective in travel mode choice. Compared with the traditional gravity model, this method can avoid the complicated process of estimating the impedance coefficient. The result of a case study show that in order to choose urban rail transit, the passenger flow at 43.7% of bus stations have increased to 2.73 times that before the advent of urban rail transit, and 56.3% of original bus passengers choose the urban rail transit system to substitute bus.