Physics – Physics and Society
Scientific paper
2005-07-14
Environment and Planning: B, 34:905-924 (2007)
Physics
Physics and Society
12 pages, 12 figures, 4 tables; 1 missing ref added and minor revisions
Scientific paper
We study the structure of the network representing the interurban commuting traffic of the Sardinia region, Italy, which amounts to 375 municipalities and 1,600,000 inhabitants. We use a weighted network representation where vertices correspond to towns and the edges to the actual commuting flows among those. We characterize quantitatively both the topological and weighted properties of the resulting network. Interestingly, the statistical properties of commuting traffic exhibit complex features and non-trivial relations with the underlying topology. We characterize quantitatively the traffic backbone among large cities and we give evidences for a very high heterogeneity of the commuter flows around large cities. We also discuss the interplay between the topological and dynamical properties of the network as well as their relation with socio-demographic variables such as population and monthly income. This analysis may be useful at various stages in environmental planning and provides analytical tools for a wide spectrum of applications ranging from impact evaluation to decision-making and planning support.
Barthelemy Marc
Chessa Alessandro
Montis Andrea de
Vespignani Alessandro
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