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| Titel |
A simple model for the self-organised evolution of road networks |
| VerfasserIn |
Sonic H. Y. Chan, Reik V. Donner, Dirk Helbing |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250043650
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| Zusammenfassung |
| Recent studies have revealed a strong similarity of the geometric properties of urban road networks, which suggests that the growth of urbanised areas can be understood as being controlled by simple self-organisation mechanisms. In this work, we present a mathematical model that allows explaining the most prominent geometric features of urban road systems in terms of an evolving network whose dynamics is controlled by a simple two-step growth algorithm. The basic ingredients of our model are (i) the radial expansion of urbanised areas, which is triggered by a random site picking that corresponds to the planning of new spots of urbanisation, and (ii) the economically efficient establishment of new links perpendicular to existing roads, which represents the generation of necessary transportation and supply infrastructures. It is demonstrated that the geometric properties of the resulting road networks are in excellent agreement with corresponding empirical findings. |
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