Sofia Metro
Metro system
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The Sofia Metro is the rapid transit network servicing the Bulgarian capital city Sofia. It is the only metro in Bulgaria. It began operation on 28 January 1998. Wikipedia
Opened: January 28, 1998
Began operation: January 28, 1998
Average speed: 40 km/h (25 mph)
Daily ridership: 450 000
Number of lines: 4
Number of stations: 47; 10 under construction
Number of vehicles: 272