Study On Characteristics And Mechanism Of Traffic Congestion In Mountainous Cities Based On Spatial Behavior Of Residents

With the rapid development of urbanization,China’s urban development has entered a rapid development stage of the Rossm curve,the population migration brought about by a large number of new population and land need to be reasonable arrangements.At the same time,the need for urban spatial structure adjustment caused by the expansion of urban scale is extremely urgent.When the number of plain city is facing a serious problem of traffic congestion caused by the spatial structure of a single center of the city,these have announced a "multi center" city development strategy,in order to eliminate the factors of city spatial structure is not reasonable,but the typical mountain multi center city also appeared serious congestion problems.In this urgent problem,the correct understanding of the state of traffic congestion and its temporal and spatial evolution is the starting point to solve the problem of traffic congestion.This paper is to study the characteristics of congestion and its relationship with the urban spatial structure of the multi center group mountain city.Due to the particularity of the physical and geographical conditions of mountainous cities,the characteristics of traffic congestion are obviously different from that of plain cities.In view of this,this paper adopts the method of spatial topological analysis and spatial behavior analysis,combined with the time people travel behavior characteristics and spatial structure characteristics of mountain city,city traffic congestion formation process and function mechanism research.Based on the relationship between city spatial structure and traffic congestion as the research object,in Yuzhong District of Chongqing city as the research sample,get real-time traffic data through the Internet map,from the perspective of spatial distribution,explore the mountain city traffic congestion rules.Summarizes the different in month,week,day time scale traffic congestion under the distribution and accumulation characteristics of space,dynamic display of the whole process of the Yuzhong congestion appeared-diffusion aggregation-dissipation,formation mechanism representation and intuitive understanding of revealing mountain city traffic congestion.Environmental behavior characteristics from the residents’ daily travel behavior needs the changes in time and space perspective to explain the mountain city traffic congestion phenomenon spatio-temporal aggregation distribution characteristics and explores the abnormal traffic congestion point judging method.This paper also through the construction of city road space model,using the method of space syntax analysis of the city spatial characteristics of the fabric to quantify the different types of city road space structure,and according to the degree of integration,degree,depth and density of road network,characteristics of spatial form of Chongqing city within the inner region of analysis.According to the syntactic features of spatio-temporal people’s travel behavior characteristics and city road space,the spatial and temporal characteristics of combination of city congestion,summarized the six types of congestion,and summarizes its time and space distribution,congestion intensity characteristics.Through the classification of mountain city traffic congestion,can have more reasons for the different types of transportation in different regions,analysis of the city,and make the space optimization strategy and traffic management strategy in detail.Through the analysis of the paper,it is concluded that the service function of the central group of mountain group city is strengthened,the living function of the surrounding group is not perfect,and the adhesion expansion between groups is an important cause of traffic congestion.The imbalance of quantity and quality in the urban living space is increasing under the background of the rapid growth of the living travel demand.The interference of the life style traffic flow to the commuter traffic flow is an important reason for the persistent traffic congestion.Traffic technology development has broken the mountain city "passive" to form a "multi center" pattern,accelerate the polarization phenomenon of leisure and consumption,living and working space,leisure life,commuting behavior caused by space city in the region to expand.The research methods,analysis methods and research results of this paper are useful for understanding the characteristics of the evolution of congestion and scientific guidance for urban planning and traffic management.