Run by ANM: connects Piscinola to the Centro Direzionale via the historic centre and Piazza Garibaldi. 20 stations (17 underground), over 20.7 km of line.
- Price: €1,50 a corsa · giornaliero ANM €4,50
- Opening hours: Lun–gio 6:30–23:02, ven–sab 6:20–1:32