The Moscow Metro in Moscow, Russia, is the world's most heavily used metro system. It is well known for the ornate design of many of the stations (such as Kievskaya Station, pictured), containing stunningly beautiful examples of socialist realist art. In total, the Moscow Metro has 277.9 km of route length, 12 lines and 171 stations. Although passenger traffic is considerably lower on weekends, on a normal weekday the Metro carries 10.05 million passengers, bringing the average daily passenger traffic per year to 8,745 million passengers per day. Moscow Metro is a state-owned enterprise.