The Calculation Method Of Carrying Capacity Of Comprehensive Transportation Hub

With the vigorous development of domestic transportation industry,the travel demand of residents is constantly rising.As the connection of urban internal and external traffic,Comprehensive transportation hub plays an important role in realizing passenger transfer between various modes of transportation and rapid distribution,and is an important node to improve the overall transport level and transport efficiency.In order to ensure the normal operation of the comprehensive transportation hub as a system under the condition of continuous influx of passengers,it is necessary to calculate the number of passengers that can be carried by the comprehensive transportation hub.Scientific understanding and measurement of the carrying capacity of comprehensive transportation hub can give full play to the effectiveness and capacity of comprehensive transportation hub,and realize the sustainable development of comprehensive transportation hub.Therefore,it is of great research value and practical significance to study the carrying capacity of comprehensive transportation hub.At present,the research on comprehensive transportation hub mainly focuses on the transfer organization of internal passenger flow and the layout optimization of station facilities.Few studies take comprehensive transportation hub as a whole system and analyze its carrying capacity from a systematic point of view.Based on this,this paper firstly analyses the concepts and connotations of comprehensive transport hub and carrying capacity,clarifies the specific significance of the carrying capacity of comprehensive transport hub from the perspective of supply and demand,and points out that the carrying capacity of comprehensive transport hub needs to be analyzed from the perspective of supply and demand at the same time,taking service level as the core,and considering passenger flow and station facilities comprehensively.Then,this paper studies the choice of passengers between different transportation modes and the behavior characteristics of passengers in different facilities at the micro level.At the macro level,it studies the complexity of passenger flow in the hub,considering the characteristics of passenger flow,the passenger flow lines and transfer modes.Then,this paper specifically analyses the facilities and stations in the comprehensive transportation hub,emphatically studies the calculation method of the scale of the stations based on passenger flow demand and service level.This paper analyses the layout mode of the facilities from the perspective of passenger transfer demand,and summarizes the capacity of the transfer and distribution facilities in the hub and its calculation method.Finally,from the perspective of combination of supply and demand,this paper elaborates the solutions to three main problems:the determination of stations scale and facilities scale,the calculation of maximum passenger flow under actual operation and the coordination of access transportation modes.With the bi-level programming model,aiming at the maximum passenger flow in the hub,under the synthesis constraints of facilities capacity,travel impedance,service level and so on,the calculation model of the carrying capacity of comprehensive transport hub is established.The feasibility and rationality of the model are verified by an example.