공항철도
Subway route
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The Seoul Metropolitan Subway is a metropolitan railway system consisting of 23 rapid transit, light metro, commuter rail and people mover lines located in northwest South Korea. The system serves most of the Seoul Metropolitan Area including the... Wikipedia
Began operation: August 15, 1974
Operator(s): Seoul Metro, Korail, Incheon Transit Corporation, and private rapid transit operators
Annual ridership: 1.91 billion (2017, Lines 1-9, Seoul Subway); 1.16 billion (2017, Korail)
Number of lines: 23
Number of stations: 768
System length: 1,302.2 km (809.1 mi) (all lines)
Track gauge: 1,435 mm (4 ft 8+1⁄2 in) standard gauge