The Sustainable Urban Mobility Plan (PUMS) is the strategic document that aims to guide the city's mobility policies for the next 10 years. The creation of adequate parking spaces both for modal interchange (parking lots) and for Accessibility to the most densely used areas (relationship car parks) and for parking by residents (permanent or appurtenant car parks) represent a key element for sustainable mobility: the park and ride parkas allow easier access from the peripheral areas to the lines of force of the transport public, maximizing the reduction of private vehicles in the most central areas, while the relational and permanent car parks make it possible to reduce parking on the road to recover spaces necessary for public transport and cycle-pedestrian mobility. From this point of view, the increase in parking facilities represents a very important objective for sustainable mobility. The preparation of the PUMS is based on a logic based on scenarios, aimed at verifying and comparing the effects of different possible strategies for the management of mobility: the Reference Scenario (i.e. the interventions that can be implemented independently of the PUMS as they are already planned-programmed and already financially funded), the Plan Scenario (i.e. the infrastructural and non-infrastructural interventions, additional to the Reference Scenario that meet the general objectives and specific that the PUMS has set itself), the Evolutionary Scenario. The PUMS geographical data being published refer to the three scenarios of the plan contained in the approved tables. 121 of 19 December 2018 and with Resolution of the Metropolitan Council n. 24 of 04/21/2021 definitively approved the Pums-Urban plan for sustainable mobility of the Metrocittà.