| With the rapid development of China’s economy,people also put forward higher requirements for travel.Highway passenger transport,which has long occupied the dominant position in the passenger transport market,has been unable to meet the growing demand for travel.At the same time,high-speed railway emerged as the symbol of railway modernization with the characteristics of safety,rapidity and comfort.Based on the background of the opening of Chang-Ji-Gan high-speed railway and the research on the coordinated optimization of passenger transport structure in regional transport corridors,this paper discusses the influence of the inter-city public travel behavior of passengers on the passenger flow sharing rate and the coordinated optimization of passenger transport structure.First of all,this paper studies the basic theory of transport channel,and briefly analyzes the development and characteristics of various passenger transport modes,which provides the basis for the analysis of technical and economic characteristics of transport supply.Secondly,the impact of high-speed rail on the passenger flow sharing rate of other passenger transport modes in the transport corridor,including general speed railway,highway and air routes,is studied.Using MNL model as the basic model,based on the SP / RP survey data of passenger travel,this paper analyzes the characteristics of passenger travel in the channel,and analyzes the applicability of each influencing factor as the characteristic variable of the model,so as to select six main factors influencing the choice of passenger travel mode.Four combination schemes of utility function are put forward,and the ability of model fitting passenger travel characteristic data under different combination schemes of characteristic variables and different utility function forms is compared and analyzed.Finally,an optimal share rate prediction model is determined through the model test value and maximum likelihood estimation value,which can fully explain and fit the number of passenger travel samples According to.The model is used to predict the share rate of passenger flow in the representative section of Chang-Ji-Gan corridor.Thirdly,the related theories of synergetics are studied,and the connotation and basic content of collaborative optimization of passenger transport structure are analyzed by using the related knowledge of system coordination.A bilevel multi-objective programming model for collaborative optimization of passenger transport structure of transport corridor based on passenger travel characteristics is established,in which the upper level problem embodies the objectives of maximum transport capacity and maximum system efficiency of transport corridor,while the lower level is the prediction model of share rate based on passenger travel characteristics,using the saturation entropy index of the corridor as the response function,taking into account the constraints of supply and demand,total investment cost,etc Constraints such as value range constraints of each characteristic variable.Taking ticket price,travel time and departure interval as decision variables,a model solving algorithm based on the combination of improved differential evolution algorithm and traditional optimization method is designed,which avoids the premature phenomenon in the early stage of algorithm operation and increases the probability of searching the global optimal solution.Taking the Chang-Ji-Gan corridor as an example,the optimal solution of decision variables and the optimized passenger flow sharing rate in the representative section of the corridor are obtained.The results of the above optimized decision variables can guide passengers’ travel choice.Finally,through the analysis of parameters and calculation results in the model,it is found that the changes of variable parameters such as ticket price,travel time and departure interval will affect the passenger flow sharing rate to varying degrees.By comparing the optimization results of the sharing rate with the prediction results,this paper puts forward the development trend suggestions of various passenger transport modes in different sections,and puts forward scientific,effective and targeted development countermeasures and suggestions for relevant decision-making departments,relevant transport industries and relevant passenger transport enterprises. |
