Research On The Traffic Risk Analysis And Organization Optimization Of The Connecting Nodes Of Urban Rapid Transit Corridors

The urban rapid transit channel connection node is broadly speaking,the urban rapid transit channel connects the traffic hub of the conventional urban road network;in a narrow sense,the urban rapid transit channel connection node is composed of urban transit road sections,entrance and exit ramps and interweaving areas,connecting each Urban road network,branch roads and traffic connection nodes of various inter-city roads.Compared with the main line of fast transit channel,the design standard is lower and the constraints are more.Moreover,the traffic composition in the connecting node is more complicated,the vehicle change lane is frequent,the operation structure is more complicated,and the connection node is not ideal for traffic organization optimization.Traffic safety issues are becoming increasingly prominent.With the development of the economy and the rapid growth of traffic,its security situation will further deteriorate.The traffic safety of the fast transit corridor connecting nodes is analyzed and the corresponding traffic organization optimization method is proposed to provide scientific basis for the connection safety technical countermeasures of the connecting nodes,thus improving the safety level of the rapid transit passage of the whole city.This paper takes the urban rapid transit channel connection node as the research object,identifies the urban rapid transit channel connection node traffic risk and proposes the traffic organization optimization method based on risk analysis as the research purpose.Based on the combination of qualitative and quantitative methods,mathematical model and case verification,the traffic organization optimization model of urban rapid transit channel convergence node based on risk analysis is constructed.This paper mainly does the following four aspects:(1)Analysis of traffic characteristics of connecting nodes in urban rapid transit passages and data processing of traffic accidents over the years.According to the detailed data of 16726 traffic accidents in Yunnan Province provided by Yunnan Traffic Police Corps(including accident identification report,case summary,speed identification,large number of accident scene maps,etc.)and selected 731 urban rapid transit passage connections from the above traffic accidents Traffic accident data of road traffic accidents,classification of accident data,information extraction and mining,and distribution characteristics of traffic accidents in time,space,meteorology and road surface facilities of urban rapid transit passages in Yunnan,and extraction of influencing factors.Based on the data analysis and analysis of three typical connecting nodes in Chenggong District,Kunming City,Yunnan Province,the paper studies the traffic volume,speed characteristics and lane changing behavior of the fast transit passages of the city,and provides a detailed study for the following.The data foundation ensures the authenticity and reliability of this article.(2)Study on the coupling cause of traffic risk and the identification of traffic risk in the connecting nodes of urban rapid transit passages.Based on the traffic safety engineering and the trajectory intersection theory,based on the data analysis of the traffic accidents of the fast transit corridor connecting nodes in the previous city,the traffic risk identification factors and the driving risk coupling factors are extracted from the driver,road,vehicle and environment and management.The hierarchical structure and internal relations of various factors in the traffic risk factor system of urban rapid transit passages are combined.Finally,combined with multi-level fuzzy comprehensive evaluation method,entropy weight method,TOPSIS method and NK model,the construction of urban fast transit passages in Yunnan is constructed.Node coupling cause and traffic risk identification model.(3)Based on the analysis of traffic risk coupling and factor identification analysis of the connecting nodes of urban fast transit passages in Yunnan Plateau,the traffic organization optimization model is constructed.Based on the existing results of data mining and the results of the above risk analysis model,from the perspective of system theory,using the basic theory of macroscopic basic maps(MFD),by determining the fast transit path of the city,the multi-channel traffic state mutation probability function and the calculation of urban fast The transit channel connects the nodes with multiple ramp control points.Finally,the TOPSIS method and the grey correlation method are used to construct the traffic organization optimization model of the urban fast transit channel connecting nodes in Yunnan.(4)Simulation analysis and evaluation of the traffic organization optimization model of the urban rapid transit channel connection node.Based on the analysis and identification of the traffic risk coupling of the fast transit channel connecting nodes in Yunnan Plateau,the traffic organization optimization model of the fast transit channel connecting nodes in Yunnan is simulated and evaluated by Vissim simulation software.The availability and portability of the paper's results were verified.