Supreme Council for National Reconstruction
Following the 1961 coup, the Supreme Council for National Reconstruction started South Korea's first five-year plan, which included a construction program to complete the railway network, to foster economic growth. As part of the program, from November 1963, two additional tracks were laid to the north of the existing tracks from Yeongdeungpo station on the Gyeongbu Line to Dongincheon station. The of new tracks, also called Gyeonginbuk Line, entered service on September 18, 1965.