The Rome Metro is an underground public transportation

Rapid transit

A rapid transit, underground, subway, elevated railway, metro or metropolitan railway system is an electric passenger railway in an urban area with a high capacity and frequency, and grade separation from other traffic. Rapid transit systems are typically located either in underground tunnels or on...

 system that operates in Rome

Rome

Rome is the capital of Italy and the country's largest and most populated city and comune, with over 2.7 million residents in . The city is located in the central-western portion of the Italian Peninsula, on the Tiber River within the Lazio region of Italy.Rome's history spans two and a half...

, Italy

Italy

Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

 and opened in 1955. There are currently two metro lines, the A line

Line A (Rome Metro)

Line A of the Rome Metro runs across the city from the north-west terminus of Battistini to the south-east terminus at Anagnina and intersects with Line B at Termini...

 (identified by the orange colour) and the B line

Line B (Rome Metro)

Line B is a metro line serving Rome, Italy, and part of the Rome Metro. Despite its name, Line B was the first line to be built in the city. It crosses Rome diagonally from north-east, starting at Rebibbia station, to south, terminating at Laurentina, in the EUR district. It crosses line A at...

 (blue). A third line, the green C line

Line C (Rome Metro)

Line C will be the third line of the metro system of Rome, Italy. It will be the first fully automated line in the city.The line is currently under construction, and the first part is scheduled to open by June 2012...

, and a new branch of the B line, are currently under construction. Plans have also been revealed for a fourth line, to be called the D Line. The current network 38 km (23.6 mi) has an X-shape with the lines intersecting at Termini Station

Termini (Rome Metro)

Termini is an underground station of the Rome Metro. The station was inaugurated on 10 February 1955, as a station on Line B and later became an interchange with Line A. The station is found in Piazza dei Cinquecento, under the Termini rail terminal...

, the main train station in Rome.

Rome's local transport provider, ATAC, also operates several other rail services: the Roma-Lido line, the Roma-Giardinetti line, and the Roma-Nord line.