The Rome Metro (Italian: Metropolitana di Roma) is a rapid transit system that operates in Rome, Italy. It started operation in 1955, making it the oldest in the country.
The Metro comprises three lines – A (orange), B (blue) and C (green) – which operate on 60 km (37 mi) of route, serving 73 stations.[1][2][Note 1] The original lines in the system, lines A and B, form an X shape with the lines intersecting at Termini station, the main train station in Rome. Line B splits at the Bologna station into two branches. The third line opened in 2014 and connects to the rest of the system through an interchange with Line A at San Giovanni.
Rome's local transport provider, ATAC, operates the Metro and several other rail services: the Roma–Lido line, the Roma-Giardinetti line, and the Roma–Nord line. The first of these, the Roma–Lido, which connects Rome to Ostia, on the sea, is effectively part of the metro network. It is run on similar lines and uses trains similar to those in service on the Metro.