Azienda Trasporti Milanesi

Azienda Trasporti Milanesi S.p.A. ("Milanese Transports Company JSC"; ATM) is the municipal public transport company of Milan and 46 surrounding metropolitan municipalities. It operates 5 metro lines (see Milan Metro), 17 tram lines (see Trams in Milan), 124 bus lines and 4 trolleybus lines (see Trolleybuses in Milan), carrying about 776 million passengers in 2018.