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Network Characteristics and Spatial Organization Optimization of Intercity Freight Transportation Connection

The spatial characteristic of a freight transportation connection network can provide a basis for regional logistics planning and freight transportation organization. The theory of spatial rescaling is introduced for the method of developing a freight transportation connection network to effectively extract the complex interrelations in intercity freight transportation connections. This approach is conducted by applying Geographic Information System (GIS) spatial analysis technology on the spatial organization process and hierarchical structure of a system to explore the dynamic features of a freight transportation connection network. Yunnan province is used as an example. Then, the correlational analysis method and complex network are used to optimize a spatial organization to strengthen transportation connection and improve network stability to conduct a comprehensive evaluation of the transportation factors. Results indicate that (1) spatial organization of a freight transportation connection network is a complex process that involves geographic concentration and preferential attachment interactions, and the control power of key nodes will transfer to the secondary nodes with a decrease of its hierarchy, causing a balance in the spatial differentiation of urban functions; (2) the scale, grade, and accessibility of transportation infrastructure have a weak effect on the intercity freight connections, and spatial organization optimization improves transportation capacity; and (3) the enhancement of survivability of key nodes in the core network will achieve the goals that balance the network connectivity and improve the stability of freight system preferentially.