Buses are equipped with special machines located at the front of the vehicle. Never purchase passes or tickets from unauthorized vendors. All are heavily frequented by pickpockets. Once you've planned your itinerary and entered the appropriate station, the rest is easy. 2 Follow the signs to the appropriate line and platform.
Blue boards indicate the line number, direction, next stations and interchanges.
4 Track your itinerary using the station maps displayed inside each wagon. Larger stations have multiple exits, but these are usually distinguished by street names. An area map is posted near each exit. Accessing and boarding the trains are done in much the same way as on the metro. Read the signs carefully to take the right direction.