Identification Of Transit Desert Of Rail Transit Stations

As an effective way to solve the problem of urban traffic congestion,rail transit constitutes the framework of the public transportation system.However,due to the fixed nature of its lines,its flexibility is poor and it is difficult to provide direct "door-to-door" services.It must be coordinated with multiple modes of travel in order to give full play to its passenger flow transportation capabilities.As the main body of the urban public transportation system,conventional public transportation has the advantages of flexible line layout,wide coverage,and good accessibility.It is one of the main connection methods around rail transit stations.How to accurately identify areas with weak public transport connections around rail transit stations is a key step in optimizing the connection between conventional public transport and rail transit.It is conducive to formulating an efficient public transportation network optimization plan,promoting the integrated development of the public transportation system,improving the transportation efficiency of the public transportation network,increasing the proportion of public transportation and the convenience of residents’ travel,and effectively alleviating the problem of urban traffic congestion.This article first defines the scope of influence of different types of rail transit stations,and compares and analyzes the spatial topological relationship between conventional buses and rail transit lines.Combining the definition of feeder bus lines,a method for identifying feeder bus lines is proposed,and the feeder bus lines around rail transit stations are analyzed and selected;Secondly,select accessibility as the indicator of the service capacity of feeder buses.Combining the characteristics of the feeder buses,constructing the accessibility analysis models of feeder buses from the two aspects of bus stops and routes,and calculating the attractive reachability and radiation accessibility of feeder buses around different stops.Give the two different weights at the same time to calculate the accessibility of the feeder bus;Then,based on the theories of Lorentz curve,Gini coefficient and K index,draw the Lorentz curve by taking the accessibility of feeder bus as the supply-side indicator,and the potential trips around rail transit stations as the demand-side indicator.Analyze the fairness of the accessibility of feeder bus around different subway stations,and combine the location Gini coefficient and the coupling coordination degree model to discover stations with weak bus service capacity around rail transit stations from both the overall and individual aspects;Finally,with the help of big data analysis technology,the introduction of taxi GPS data.By analyzing the spatial interaction relationship between taxis and feeder bus,a method for identifying the transit desert is proposed,and the transit desert around rail transit stations are analyzed and identified.According to the method of identifying the transit desert,the transit desert around the administrative center station of Xi’an Rail Transit Line 2 and Weiyijie station were respectively identified.It also excavated 19 main transit desert that are outside the radiation range of feeder bus lines,which provides a good theoretical support for the layout of the public transportation network and the optimization of the transfer and connection between conventional public transportation and rail transit.