The Suin Line (Suwon-Incheon) is a rail line serving the Seoul Capital Area.The original route, abandoned in 1995, was one of the few narrow-gauge railways in South Korea. It connected Suwon to Namincheon via Ansan and Siheung. However, since December 28, 2004, the Suin Line is being reconstructed with standard gauge and double tracking as an integral part of the Seoul Metropolitan Subway network and is opening in three phases.