Baku Metro
At that time, Azerbaijan was part of the Soviet Union until the end of the Soviet Union in 1991. The Baku Metro has the features found in most other ex-Soviet metro systems. These include very deep metro stations, and detailed decorations that blend traditional Azerbaijani national designs with Soviet ideology. The metro system has three lines and has 40.3 kilometers of double railway tracks with 27 stations, which, apart from two stations, are underground. It is run by the Bakı Metropoliteni. In 2015, it carried 222.0 million passengers, which means an average ridership of approximately 608,200 passengers each day.