Evaluation Of Comprehensive Traffic Function In The Yangtze River Economic Zone

In recent years,comprehensive transportation has gradually become a hot topic in international and domestic transportation geography.The "Thirteenth Five-Year Plan" put forward the need to build an integrated transportation system,focus on building transportation infrastructure,better play the role of transportation support and guidance,and lay a solid foundation for the comprehensive construction of a well-off society.Under this requirement and background,relying on the golden waterway,the comprehensive transportation development of the Yangtze River Economic Belt,which combines various transportation modes such as railway,highway,waterway,aviation,and pipeline,is in full swing.However,in recent years,fierce competition between provinces and cities in the Yangtze River Economic Belt has resulted in extremely uneven development in the eastern,central and western regions.Compared with the requirements for promoting the development of the Yangtze River Economic Belt,there is still a certain gap in comprehensive transportation construction,mainly reflected in the incomplete transportation network structure,low level of transportation hub scale,incomplete transportation functions,etc.Therefore,further research and analysis of the problems behind its development have important theories and realities for understanding the level of comprehensive transportation functions in the Yangtze River Economic Belt,optimizing the allocation of transportation infrastructure,and promoting the balanced development of the east,middle,and west of the Yangtze River Economic Belt significance.Based on the Node-Place model theory,this paper considers that the transportation function of each mode of transportation is biased,it is biased to the node function or the place function.On this basis,a comprehensive indicator system for comprehensivetransportation functions in the Yangtze River Economic Belt is constructed from three aspects: transportation completeness,scale,and transportation functions,focusing on the construction of node function model based on traffic network accessibility and place function model based on spatial connection strength of node cities.By using spatial syntax,gravity model and GIS spatial analysis method,this paper comprehensively analyzes and evaluates the comprehensive traffic function of the Yangtze River economic belt from many aspects and perspectives: on the one hand,starting from the type of transportation and classification criteria,grasp the current traffic completeness and traffic hub scale,and respectively express them in space;on the other hand,the Depthmap and ArcGIS software are used to calculate the accessibility of the transportation network and the spatial connection strength of the node cities.Both of them respectively characterize the node functions of different types of transportation networks and the place functions of different types of transportation hubs,from the perspective of spatial distribution and spatial agglomeration,the differences and similarities of traffic functions under different modes of transportation are analyzed.Through the weighted superposition of the above results,the comprehensive traffic function of the Yangtze River economic belt is evaluated.The research in this paper draws the following conclusions:(1)There are obvious regional differences in the accessibility of the railway,highway and inland waterways: the connectivity of the transportation network in the middle and lower reaches of the Yangtze River is relatively high,and the upstream area is relatively poor due to the lack of coverage of the transportation network.In addition,the accessibility of the three transportation networks basically shows the sequence of highway ? railway> inland waterway.As far as railways are concerned,the distribution of the Yangtze River Economic Belt from east to west has gradually decreased,and a “core radiation” spatial pattern centered on the provincial capital has been formed within the provinces and cities,with good accessibility in the middle and lower reaches.As far as highways are concerned,the Yangtze River Economic Belt has basically realized the integration of highway networks,and especially the central and eastern regions have a high degree of connectivity.The western region has less vertical highway coverage and relatively poor internal accessibility.The high-accessibility areas are mainly concentrated in the Chengdu-Chongqing urban agglomeration,forming a "dual-core radiation" spatial pattern with Chengdu and Chongqing as the core.Thehigh-grade inland waterways of the Yangtze River Economic Belt have relatively poor radiation effects due to their low coverage.(2)From the perspective of railway stations,airports,and ports,the spatial connection strength of each node city has obvious regional differences and polarization phenomena,and basically shows the sequence of train station ? airport> port.From the three perspectives,the strength of the spatial connection between the nodes of the Yangtze River Economic Belt is a combination of multiple cores and continuous distribution,the eastern region has the strongest overall spatial connection,the central region is stronger,and the western region is the weakest.The overall development of transportation in the east,central,and western regions is uneven.(3)As a whole,the development of comprehensive transportation in the Yangtze River Economic Belt has spread from the core to the edges,and the effectiveness of the development of multiple node cities has begun to appear.The development of comprehensive transportation has gradually spread from provincial capitals and central cities to more remote cities in the region,and comprehensive transportation in more remote cities has also developed to a better level.