铁路、公路和内河航道的交通网络通达性均存在明显的地域差异性：长江中、下

Transport network accessibility railways, roads and waterways are obvious regional differences: Yangtze, the higher regional transport network interconnection downstream extent, since the area upstream extent of coverage of the network traffic is relatively lacking, the relatively poor accessibility. In addition, more than three road transportation network to reach basic presentation ≥ rail> inland waterways sequence. In terms of railway, the Yangtze River economic belt from east to west railway distributed gradually reduced to form a "core radiation" spatial pattern to the center of the capital in the interior provinces, midstream and downstream areas accessibility is good. On the highway, the Yangtze River economic belt has basically realized the road network integration, especially in a high degree of interoperability central and eastern regions. Vertical road the western region covering less, relatively poor internal accessibility, accessibility of high-value areas are mainly concentrated in Chengdu-Chongqing city group, to form a "dual-core radiation" spatial pattern of Chengdu, Chongqing, as the core. Yangtze River economic belt of high-grade inland waterways because of the low level of coverage, the radiation effect is also poor.

There are obvious regional differences in the accessibility of the transportation network shipping network shipping network shipping in railway, highway and inland waterway: the connectivity of the transportation network in the middle and lower reaches of the Yangtze River is high, and the upstream area is relatively poor due to the relative lack of transportation network coverage. In addition, the traffic network of the above three basically presents the sequence of highway-railway-inland waterway. As far as the railway is concerned, the distribution of the Yangtze River economic belt from east to west is gradually reduced, and the "core radiation" spatial pattern of "core radiation" centered on the provincial capital is formed within the provinces and cities, and the midstream and downstream areas have better accessibility. As far as roads are concerned, the Yangtze River Economic Belt has basically realized the integration of the highway network, especially the central and eastern regions of the high degree of interconnection. The vertical highway cover in the western region is less, the internal accessibility is relatively poor, and the high-value area of accessibility is mainly concentrated in the Chengyu city group, forming the "double core radiation" spatial pattern with Chengdu and Chongqing as the core. The high-grade inland waterway in the Yangtze River Economic Belt is also less radiation effect due to its low coverage.

There are obvious regional differences in the traffic network accessibility of railway, highway and inland waterway: the middle and lower reaches of the Yangtze River are highly interconnected, while the upper reaches are relatively poor in accessibility due to the relatively poor coverage of the traffic network. In addition, the traffic network access of the above three basically presents the sequence of highway ≥ railway > inland waterway. As far as railways are concerned, the distribution of the Yangtze River economic belt is gradually decreasing from east to west, forming a spatial pattern of "core radiation" centered on the provincial capital within each province, with better 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, especially the high degree of interconnection between the central and eastern regions. In the western region, the vertical highway coverage is less, and the internal accessibility is relatively poor. The high accessibility areas are mainly concentrated in Chengdu Chongqing urban agglomeration, forming a "dual core radiation" spatial pattern with Chengdu and Chongqing as the core. Due to the low coverage, the radiation effect of high-grade inland waterway in the Yangtze River economic belt is also poor.