The ornate museum-like interiors of Arbatskaya Station on the Arbatsko-Pokrovskaya line.
The Moscow Metro has broad gauge , 1520 mm , like regular Russian railways , and third rail supply of 825V AC . The average distance between stations is 1800 m , the shortest ( 510 m ) section being between Aleksandrovskiy Sad and Arbatskaya and the longest ( 4 km ) between Kievskaya and Park Pobedy . The long distances between stations have the positive effect of a commercial cruising speed of 41.3 km/h.
Since the beginning of Moscow metro, platforms have been built at least 155 m long, prepared for 8-car trains. The only exceptions are stations of Filyovskaya line: Delovoi Tsentr, Studencheskaya, Kutuzovskaya, Fili, Bagrationovskaya, Filyovskiy Park, Pionerskaya , which only allow for 6-car trains (note that this list includes all of ground-level stations of Filyovskaya line, except Kuntsevskaya ).
The Moscow Metro train is identical to those used in all other ex-Soviet Metro cities .
Two of the stations exist as double halls, and two have three tracks. Five of the stations have side platforms (only one of them-subterranial). The station Vorobyovy Gory is situated on the bridge. Three other metro bridges exist, the other three are covered and hidden. In addition there are two closed and one derelict stations.
Although officially this fact is not confirmed there are many independent studies suggesting that a second, deeper metro system exists under military jurisdiction and is designed for emergency evacuation of key city personnel in case of attack. It is believed that it consists of a single track and connects the Kremlin , chief HQ, Lubyanka and Ministry of Defence, and numerous secret installations. There are also entrances to the system from several civilian buildings such as the Russian State Library , Moscow State University (MSU) and at least two stations of the regular metro. It is speculated that these would allow for the evacuation of a small number of randomly chosen civilians. The only known junction between the secret system and normal Metro is behind the station Sportivnaya of the Sokolnicheskaya Line . The final section of this system was completed in 1997.
There is an interesting urban legend about the origin of the ring line. A group of engineers approached Stalin with plans for the Metro, to inform him of current progress and of what was being done at that moment. As he looked at the drawings, Stalin poured himself some coffee and spilt a small amount over the edge of the cup. When he was asked whether or not he liked the project so far, he put his cup down on the centre of the Metro blueprints and left in silence. The bottom of the cup left a brown circle on the drawings. The planners looked at it and realized that it was exactly what they had been missing. Taking it as a sign of Stalin's genius, they gave orders for the building of the ring line, which on the plans was always printed in brown. This legend, of course, may be attributed to Stalin's cult of personality