(BIT), costs €1.50, and is valid on the Metro, buses, trams and suburban trains inside the Rome municipality for 100 minutes from first validation. Other tickets are available, including daily (€7.00), 2-day (€12.50), and 3-day (€18.00) passes (Rome 24h/48h/72h), and a weekly pass (€24.00), the Carta Integrata Settimanale (CIS). Monthly passes that are valid during the charged calendar month for unlimited journeys available for the personal usage (€35.00) or impersonal usage (€53.00) and may be used alternatively by different persons. Children under 10 years old travel can travel for free on public transport services when accompanied by a fare-paying adult. Two proximity cards are available in Rome, èRoma and Metrebus Card Red, which can be charged with season tickets, replacing paper for this type of ticket. Operating hours Service starts at about 5:30 am and ends at about 11:30 pm. On Fridays and Saturdays service ends later, at about 1:30 am. When the Metro is closed, a night bus service operates with lines that follow the same routes and stop at the same stations as the Metro. Line A is served by bus NMA, Line B is served by bus NMB/NMB1, and Line C is served by bus N28. Other rail lines operated by ATAC Roma–Lido Construction of the Roma–Lido line began shortly after the end of World War I and was completed some six years later in 1924. It began operation as a steam locomotion railway but electrification was completed less than a year later. The line is operated as an integrated part of the Metro, but runs entirely overground. It runs from the Roma Porta San Paolo station beside the Line B Piramide station and runs alongside Line B as far as EUR Magliana. It then continues separately on to the seaside district of Ostia. The line terminates beside the end of Via Cristoforo Colombo. Roma–Giardinetti Officially termed a railway, the Roma–Giardinetti line is a narrow gauge tram which connects Laziali (a smaller, local train station some 800 metres east of Termini's main concourse) with Giardinetti, just past the Grande Raccordo Anulare (GRA) – Rome's orbital motorway. The line originally ran to Frosinone some from Rome, but has been gradually reduced in length, when the section from Giardinetti to Pantano, which will become a permanent part of Line C, was taken out of service. Most recently also the part from Centocelle to Giardinetti was reduced. Roma–Civita Castellana–Viterbo The