The metro has three lines, red, green and yellow, as well as the blue urban rail line. It runs from 06:00-24:00.
You can buy tickets in the stations, newsagents and parking meters. A standard urban ticket costs around €1,50 and is valid for 90 minutes.
If you want to visit the Rho Fira Exhibition centre, you can take the subway, but you need to buy an extra urban ticket. This will cost you around €2,60.