Seoul Metropolitan Subway
Seoul Metropolitan Subway is one of the most populated subway systems in the world. Operated by three different organisations, KNR (Korean National Rail), SMRTC(Seoul Metropolitan Rapid Transit Corp), and SMSC(Seoul Metropolitan Subway Corp.). Those organisations combined transports 2,440 million people per year.
The subway system currently has 10 lines, including greater metropolitan area of Seoul, including Incheon.
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