As an extension of the future Daegok–Sosa–Wonsi Line, the Gyooe Line may be upgraded to a double-track, electrified railway, and see regular passenger service integrated into the Seoul Metropolitan Subway.
East Coast Main Line | West Coast Main Line | New Line Cinema | Cunard Line | White Star Line | The Onedin Line | Maginot Line | Great Central Main Line | What's My Line? | Walk the Line | Stena Line | Line 13, Shanghai Metro | Line 13 | A Chorus Line | What's My Line | V/Line | branch line | Wirral Line | Siegfried Line | Midland Main Line | Gyeongbu Line | Line Renaud | Line Islands | Line 2 | Line 1, Beijing Subway | Line 1 | Green Line | Brighton Main Line | The Thin Red Line (1998 film) | The Thin Red Line |