Atac di Roma

Rome has an extensive internal transport system and is one of the most important road, rail and air hubs in Italy.

Rome has an urban transport network which consists of buses, trams, rapid transit lines, light rail lines and suburban railways.

Roma servizi per la Mobilità is the municipally-owned public transport agency which is in charge of programming bus routes and providing real-time information and services to the user.

Atac (formerly an acronym for Azienda del Trasporto Autoferrotranviario del Comune di Roma, "Company for rail and road transport of the city of Rome") is the municipally-owned public transport company which operates most of the public transport lines in the city.

Roma TPL is a private company which operates a minority of bus lines.

Rome Metro is the rapid transit system serving the city with three underground lines. The first track opened in 1955. The total length of the network is 60 km (37 mi) with 73 stations. There are three lines A, B - plus a branch called B1 - and C. Lines A and B intersect at Roma Termini station; line C is completely automated but is not yet connected to the rest of the network.

A fourth line, line D, is under development. It will have 22 stations over a distance of 20 km (12 mi).

Rome's overground rail transport comprises the tramway network, suburban and urban lines in and around the city of Rome, plus an "express line" to Fiumicino Airport. Whereas most FS-Regionale lines (Regional State Railways) provide a largely suburban service with more than twenty stations scattered throughout the city, a metro-like service is provided by the Roma-Lido (starting at Ostiense station) and Roma-Nord (starting at Flaminio station) rail lines, but with lower frequencies than Metro lines, as the Rome–Giardinetti light rail line. There is also the Lazio regional railways, a commuter rail system with seven lines which link the suburbs of the Rome Metropolitan Area. One of these lines serves the second airport of the city, Ciampino.

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Wikipedia