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The Spread of Traffic Effects and Regions of a Network

A regionalization scheme for transport networks is sought in order to reduce the extent over which the impact of investing in specific links need be traced. Empirical data on travel are examined for structural regularity. The regions of a small city which emerge are tested by reassigning existing traffic to a modified transport network. A link in one region is changed to trace the permeation of link-volume changes through regional partitions. The results indicate a strong structure and degree of separability in the pattern of demand and use of a small urban network, which bodes well for more widespread application.