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 the Florentine tramway system, a reliable, regular, frequent and high-speed public transport network capacity, plays a central role in the PUMS of the Metropolitan City. This is an infrastructure of primary strategic importance, a corridor of force, which will make it possible to put into operation a public service with high potential. The exact position of the tram routes may be subject to modifications and updates during the various design phases with respect to what is reported in the documents of this plan. 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 managing 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 backed), the Plan Scenario (i.e. the infrastructural and non-infrastructural interventions, additional to the Scenario of reference that respond to the general and specific objectives set by the PUMS), 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.