ATM - Azienda Trasporti Milanesi The Azienda Trasporti Milanesi operates within the metropolitan area, managing a public transport network consisting of three metropolitan railway lines and 120 tram, trolley-bus and bus lines. Overall the network covers nearly 1400 kms reaching 86 municipalities. Besides public transport, ATM manages the interchange parking lots and the on-street parking spaces in the historical centre and in the commercial zones using the SostaMilano parking card system. Milano Transport ATM- Azienda Trasporti Milanesi http://www.atm-mi.it/