Seoul Subway Line 6 of the Seoul Metropolitan Rapid Transit Corporation cuts across northern Seoul in a U-shape. Line 6 opened its first section 7 August2000: Bonghwasan - Sangwolgok (4 km). On 15 December2000 the remaining section (27 km) was also put into service although 4 stations in central Seoul had not been finished by then (Itaewon - Yaksu). These stations were finally operable on 9 March2001, which concluded Seoul's ambitious metro expansion programme carried out since 1990. The transfer corridor at Sindang (Line 2) did not open until 3 August2001.
Line 6 is the only subway system in Seoul to have parts with one-directional lines. Commonly called the Eungam Loop, stations 611 - 615 only have trains going in the counterclockwise direction. Consequently, these stations also have one-sided platforms.
In the future, Line 6 will be extended to the east, in order to enable transfers with the Gyeongchun Line. One new ground-level station will be built, most likely within the train servicing depot, and its tentative name is "Sinnae Station."
