Analysis And Evaluation Of Transport Capacity Coordination Of Multi-modal Transport Network Based On Transport Transfer Hub

With the rapid development of urban economy and the rapid increase of vehicle ownership,the contradiction between supply and demand of urban commuting trip and the mismatch of traffic network resources are becoming more and more serious.In face of the urban multi-mode traffic network,the urban traffic transfer hub was used to coordinate the transportation capacity between different traffic networks.In this way,the network capacity of the entire traffic system wa excavated,and the public’s travel efficiency and travel experience is improved.In this paper,the urban main-passenger traffic routes and transfer hubs are taken as the research objects,the characteristics of multi-mode traffic network are analyzed,and the influencing factors of multi-mode traffic network capacity coordination and the evaluation index of multi-mode traffic network capacity coordination are determined.Through the literature,this paper summarized the characteristics of single traffic network mode and the attributes of traffic transfer hub,the multi-mode traffic network topology and road impedance function were constructed,the multi-mode traffic assignment model and the multi-mode traffic network assignment model-solving algorithm were constructed.Based on the multi-mode traffic network capacity coordination analysis method,the impact of traffic transfer hub on the multi-mode traffic network capacity coordination was quantitatively analyzed.Finally,the feasibility and rationality of this method was verified.Firstly,the supply and demand characteristics of the transport network of cars,buses,metro tracks,P+R transfer hubs and bus-metro transfer hubs were analyzed by designing a survey for the operation status of part of multi-modal traffic networks and transfer hubs.Based on the data from survey,the congestion situation of multi-mode traffic network in some cities was analyzed and obtained.Through literature review,it was confirmed that the main factors affecting the coordination of urban transport network capacity were transfer time,transfer cost and transfer penalty,and the single network service level,Gini coefficient of traffic network and the proportion of traffic demand among modes were taken as the evaluation indexes of traffic capacity coordination of urban traffic network.Secondly,the network structure characteristics of urban multi-mode traffic network were analyzed.This paper summarized the characteristics of urban car network,bus network,metro track network and walking network from the perspective of traffic supply facilities,and compared the behavior characteristics of single-mode travel and combined travel(bus-metro and P+R).Based on the super network model,the urban multi-mode transport hub nodes were transformed into virtual transfer paths and the urban multi-mode traffic network topology were constructed.Based on The impedance function of urban multi-modal traffic network segments suitable for commuters constructed,two typical combined travel modes were selected to establish the impedance function of urban multi-modal traffic network paths.Finally,in this paper the capacity coordination of urban multi-modal transport network was studied.Based on the stochastic user equilibrium assignment model,a model of traffic assignment was established to minimize the traveler’s travel cost,and successive weighted averaging algorithm was used to solve the assignment model.Based on the above research,a coordinated evaluation method of urban multi-mode traffic network capacity was established.By changing the amount of commuting OD trips,this paper analyzed the change mechanism of three kinds of network capacity coordination evaluation indicators in order to select the commuting OD travel interval with the best network capacity coordination ability.Based on sensitivity analysis,this paper quantitatively studied the guiding ability of transfer hub attributes to urban multi-mode passenger flow.