KnowraSeoul Metropolitan SubwayLinked fromLinked fromThe 6 pages that link to Seoul Metropolitan Subway, each with the reason it gives.All 6Related 4Compared with 2KorailCompared with: It includes multiple operators, so not every Seoul-area train is a Korail service.Busan MetroCompared with: It provides a national-scale comparison for Busan’s smaller metropolitan rail network.