The St Petersburg Metro opened on 15 November 1955 and became the second metropolitan after Moscow. Petersburg's metropolitan is the deepest in the world at the depth of the tunnels laid to 86 metres. In the construction of the subway, many technologies were used for the first time in the world. In particular, closed stations with no platforms, and trains are stopped at stations with a precise calculation that the doors of the wagons coincide with the station ' s doors and, subsequently, the synchronization system has opened simultaneously.
Although there was no tram in St. Petersburg until the 20th century, and in most cases the tram was the predecessor of the subway, the first sub-ground construction projects in Petersburg were at the end of the 19th century. Outstanding disputes at different levels, as well as differing views of the Government ' s branches wishing to take control of the project, prevented the project from being implemented.
The subway plans are back in Soviet time. In 1938, a plan for the establishment of a peterburg subway and the organizations responsible for the project was commissioned. The construction started in 1941, but during the Great National War, all work was frozen for understandable reasons.
In 1947, after the war, work was resumed and on 15 November 1955, the solemn opening of the Leningrad Metropolitan was adversarial and was launched.
As of March 2014, it is 5 lines and 67 stations. The total length of the network is 113, 6 km. Passenger traffic is about 800 million people per year.
