Evaluation And Optimization On The Coordination Degree Between Urban Scale And Urban Transportation System

Today,cities are accelerating their developing speed and expanding their scale.Changes in the urban scale often directly affect the changes in the level of urban residents' transportation needs.If the supply level of the urban transportation system lags behind the potential transportation demand level bring by the current urban scale,the residents' travel demand will not be met,which will cause serious problems such as the increase of travel cost and the obstacle to social economic development.Only when the supply and demand of urban scale and the transportation system are in a balanced and coordinated developing state,it can not only save the resources,but also quickly promote the city construction.Therefore,it is necessary to construct a reasonable evaluation system to judge whether the interaction between the urban scale and the transportation system is coordinated to promote the sustainable development of the city.Only by scientifically judging the interactive relationship between them can we provide reasonable and effective suggestions for future urban planning.Based on the above contents,this paper selects the influencing factors from the perspective of urban scale and urban transportation system respectively,constructs an evaluation system,and uses the coordination degree as the measurement basis to judge the coordination state of transportation supply and demand under the urban scale.This article will focus on the following three aspects:First,the interaction between the city scale and the urban transportation system is described,and an evaluation index system is constructed.This paper takes city scale and urban transportation system as research objects,analyzes the interactive relationship between them,selects the main influencing factors according to the objectives of transportation supply and demand coordination,and constructs an index system for evaluating the coordination degree of city scale and transportation system.Then,using the entropy weight method and Data Envelopment Analysis(DEA),an evaluation model of the coordination degree between urban scale and urban transportation system based on entropy-DEA is constructed.Based on the indicator data of 24 surveyed cities,the coordination degree evaluation model is used in this paper to analyze the coordination degree of different cities,the supply state of urban transportation systems,and the ranking of coordination degree of different cities.Finally,for cities with poor coordination evaluation results,a coordination optimization method based on euclidean distance-benchmark analysis is constructed to extract the comprehensive information of all benchmark cities to optimize the coordination of cities to be optimized.In order to test the effect of the optimization method of the constructed model,this paper uses two coordination optimization methods based on the CCR model parameter value for comparison.The coordination optimization method based on the CCR dual weight value provides a comparison of the weight contribution of benchmark cities.The coordination optimization method based on CCR projection values provides a comparison in the selection of reference objects.On this basis,this paper validates the effectiveness of the coordination optimization results and proposes targeted countermeasures and suggestions.