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Accessibility of a node is given by the travel cost between a node and another node, or a weighted average of travel cost to a number of nodes in the network (Holl (2007) J. Transp. Geog. 15, 4). Transport nodes show a distinct hierarchy, and the importance of a transport node appears to correlate strongly with its effects on the surroundings (van den Berg and Pol (1998) Env. & Plan. C 16, 4). Factors that determine the importance of a transport node are: the situation of the transport node with respect to major metropolitan regions; the number and type of the converging transport modes; the number of destinations that can be reached from the transport node, and the frequency of the transport moves. The more important a transport node, the greater the potential regional economic development (van den Berg and Pol (1997) Eur. Reg. Sci. Assoc. 37th Eur. Congr.). See also de Langen and Visser (2005) J. Transp. Geog. 13, 2. See Devlin et al. (2008) J. Transp. Geog. 16, 1, on arc-node topology—the topological data structure ArcInfo uses to represent connectivity between arcs and nodes.

Subjects: Earth Sciences and Geography.

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