Research On The Evaluation And Optimization Of Long Lines Of Urban Public Transport In Xi’an

As a multi-functional development city,Xi’an has formed an agglomeration effect in the Hi-tech Industries Development Zone,Qujiang New District and Chanba Ecological Area.The length of the line has also increased.But an excessively long line will cause problems such as increasing non-linear coefficient,reducing bus operation efficiency and service level,and uneven passenger flow distribution.Evaluation and optimization research on long lines will help solve the above problems and ensure the efficient operation of the public transport system.First of all,this paper defines the length range of the long bus line in Xi’an,and constructs an evaluation index that takes line length,number of stations,non-linear coefficient,and number of vehicle configurations as input indicators,and average station distance,and other line indicators as output indicators.System,the establishment of DEA-CCR model to evaluate the rationality of Xi’an’s long-distance bus line planning,analysis shows that 83.8% of the long lines are invalid,and the excessive length and non-linear coefficient are the main reasons for the low efficiency of long lines.Secondly,by analyzing the characteristics of passenger flow distribution and passenger demand characteristics of long lines through actual survey data,it is pointed out that there are problems such as unbalanced passenger flow distribution space,excessive standing density of passengers,low bus punctuality rate,and unclear positioning of the nature of the line.Third,select the line efficiency value,line length and non-linear coefficient as clustering factors,and use the SPSS statistical analysis software to use the K-means clustering algorithm to perform cluster analysis on the long lines of Xi’an,and classify the types of the long lines of Xi’an.Combining the characteristics of passenger flow distribution on the route,optimization methods such as optimizing dispatch mode,splitting long lines and adjusting bus stops are proposed.Combining passenger flow and the number of multiple bus routes,the split point of the route is determined,and the calculation of the reasonable number of vehicles is given.method.Finally,taking Xi’an 313 bus line as an example,the line was optimized.After the optimization,the passenger flow distribution of the line was balanced.The average standing density of passengers in the bus was reduced by more than 40%,which reduced the degree of congestion in the bus,and the non-linear coefficient was reduced by 10%.The number of vehicles is reduced by 13%,which saves transportation resources.The long-term bus route optimization program proposed in this article is scientific and effective,and provides a basis for the optimization of long-term bus routes.