The proposed topic is connected to the thinking on fragmentation of urban habitats provoked by infrastructures. The Urban Plan which deals with infrastructures in the area - assets which belong to the community and that make up fixed social capital - can be without doubt defined as a mobility plan. The values of the inhabitants should be found in this plan - if possible ubiquitous and not lacerated by fragmentation. In this article I would like to highlight the fact that the railway infrastructure, and more generally collective transport in its different forms, can be entrusted with the difficult task of re-establishing the equilibrium in a city that does not have a balanced use of the car - an awkward situation but at the same time one which it is becoming used to.
