A street network is a system of interconnecting lines and points (called edges and nodes in network science) that represent a system of or for a given area. A street network provides the foundation for network theory; for example, route planning or creating Rest area.Wade, T. and Sommer, S. eds. A to Z GIS
They greatly affect in-town movement and traffic. Street networks can become very complex in cities. Street networks are very often localized, because there is little non-highway transportation from town to town. The U.S. Highway System is like a street network, but it is national, and consists of instead of streets and roads.
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