This number proposes a study on the mobility system at the supra-municipal scale  and in particular on the relationship between the  urban sprawl processes and the role of the network and mobility systems. The expansion city changes the organization of space and land use systems, especially residential, environmental, production, equipment and public services, not least the mobility system, which innervates the territories and characterizes its efficiency, to the point that, in many cases, the infrastructural delays come to influence the organization and competitiveness.