The Janghang Line is served by frequent Saemaeul-ho and Mugunghwa-ho passenger train services between Seoul and Iksan.

[1] The entire Janghang Line is being electrified, double-tracked, and upgraded for higher speeds with a straighter alignment.

[3] The realigned 14.2 km (8.8 mi) Nampo-Ganchi section, including the relocated Ungcheon station, was opened on January 5, 2021.

[6] Also as of April 2023, the double-tracking of the Hongseong-Daeya section, including the 18.8 km (11.7 mi) Sinseong-Jupo realignment that was scheduled to begin construction in 2023, was in advanced planning, with a 2027 completion targeted.

Seohae Line will serve 250 km/h (155 mph) speed, which will dramatically reduce travel time between Seoul and Hongseong.