This line, located in Bucharest, Romania, is using CAF and Bombardier trains to transport people from the south of Bucharest all the way up north, being more efficient than going by car. For me, this route would be interesting because it has a fast accelerating and fast braking train, with plenty of stops and the need to be on time. It is mostly underground, only at the last station, Berceni, going on the ground. At Berceni is also the depot. Nowadays M2 is overcrowded due to its stations that are so well placed throught Bucharest. M2 is the BLUE line.