For the cities taken into account, we have made reference to semicircle scheme in which are highlighted the city of the first, second and third belt. Each gap between a belt and the other corresponds to a distance of about ten kilometers between the respective city centers.The north Milan is characterized by a dense radial network infrastructure, which connects the city with the towns that run along its radial. We therefore reported these "rays infrastructure" with its trends.
Each green circle is related to the number of inhabitants of the city that represents.

This work was born from a personal study, related to university course "Urban planning".