Passenger-Flow Spatial Distribution Model of Urban Rail Transit

In order to analyze the variation of urban rail transit(URT) passenger flow against the distance from the city center,a model characterizing the passenger spatial distribution of urban rail system was proposed,which was based on the deterioration model of pavement performance.The model was verified using the real passenger flow data of URT in Shanghai and Beijing.The results show that the larger the value of the important node coefficient K,the more important the important node station and the larger the passenger volume will be.When the shape parameter β is larger than 1,the trend curve of passenger flow is inverse S shaped;when β is less than 1,the trend curve of passenger flow is concave.In addition,the urban scale parameter reflects the radiation range of rail transit.When the value of α is near 15 km,the connection line of urban scale parameter is near the Outer Ring Road in Shanghai,indicating that the URT passenger flow is mainly concentrated in the main urban areas.The predicted variation of URT forecasting passenger flow against the distance from the city center is accordance with the actual situation.