Moscow Metro, subway system serving the city of Moscow and several neighbouring towns within Moscow oblast. The Moscow Metro system consists of a series of 14 radial lines running like spokes from the central hub to the outskirts of the city, plus the Number 5 (Koltseveya), which runs around the city in a 12-mile (20-km) circle, linking the other lines, and the new (completed 2023) 36-mile (57.5-km) -long Big Circle line. The Metro is one of the busiest subway networks in the world and on a normal weekday will carry more than 8 million passengers along 286.8 miles (461.5 km) of track, visiting 258 stations on route.
Work began on an underground railway system for the city of Moscow in the 1930s, and the opening stage was built from 1935 to 1937; the first line stretched from Sokolniki to Park Kultury. The second stage was completed before the Soviet Union entered World War II in 1941, and work on the third stage continued throughout the war, with stations being used as underground shelters from German bombing. The fourth and fifth stages were constructed during the later 1940s and into the 1950s, at the time of the Cold War; consequently, some of the stations were built to withstand a nuclear strike. Another stage of expansion began in the 21st century.
The most striking feature of the Metro is the grand and ornate styling of many of its stations, which are decorated to resemble the interiors of tsarist palaces. The tiled walls are inset with inspiring sculptures, mosaics, and paintings of workers, peasants, and soldiers enjoying the fruits of the Soviet system—a deliberate ploy to advance the cause of communism. Newer stations are less ornate, however.
The Moscow system has a good reputation for efficiency and features an unusual gender-specific announcement scheme. A male voice reads the announcements for all trains going into the city center, whereas a female voice does the same for outward-bound trains. On line Number 5, a male voice indicates travel in a clockwise direction, a female voice for counterclockwise travel.