Related:
"Metro"

Rome has the Metro composed of two lines: Linea A which goes from to Cinecittà to Battisti, and Linea B which goes from Eur to Rebibbia. Linea A is ideal if you want to go to Piazza Spagna and find yourself walking through Via del Corso; Linea B is ideal if you want to go to the Colosseo (Coliseum). These two lines meet at Termini, Rome’s main railways station. Tickets to be able to take this facility are sold in the Tabaccherie, in the Bars that have the T symbol outside, or at the newspaper stand (called edicole). You can also find the machines in the entrance of the Metro stations, but you have to be able to pay with exact change or else the ticket can’t be bought.

http://www.atac.roma.it/