Around the world, a lot of big cities have a metro. This mean of transport can carry many people and there are no traffic jams with this vehicle. The first metro was put into service in London in 1863. During the World War II London Underground was a shelter for people. When the wartime had been over, the metro began to appear in many cities. The cities grew, and the metro gave a solution to connect the centre of the city and its suburbs. Moreover, people could buy a ticket which had an affor...