BUS
Rome's bus network is extensive and functions quite well, but the metro (subway) is much simpler for the short-term visitors to master. Public transportation tickets must be purchased in advance from tabacchis, newsstands, bars, or vending machines (exact change only!) at metro and major bur stops.
METRO
The subway of Rome (called Metro by residents) goes round rather than through the historic city. It has only two lines, "A" (red) and "B" (blue), which cross at Termini Central Station.
Trains run approximately every 2-5 minutes, from 5:30am until 11.30pm every day (until 1:30am on Friday and Saturday)!!
Nightime
Metro line B - where Twincities youth hostel is located - keeps running 'til 1:30 am during weekends. Past 01:30 am the service is garanteed but the night BUS N2, which runs every 20-25 minutes
Metro line A closes at 10pm - there's some restructuration going on but the service is supplied by A01 Bus.
The most important Turistic tickets is ROMAPASS (see section).