Street patterns and public space in urban areas

The urban form is closely related to the design of the roads. Especially in small towns carve more road infrastructure that water circuit. Moreover the extension mileage of the road network there are other interesting metrics that can be assessed, one is the percentage of road affected surfaces (extension * section) that introduces the topic of climate change due to the impervious surfaces (run-off) and the heat island effect (UHI). Connectivity (density of intersections) is a measure analyzed and studied by Robert Cervero and also used in the rating LEEDND and is a measure of the potential easy local urban fabric.

source: http://unhabitat.org/the-relevance-of-street-patterns-and-public-space-in-urban-areas/