Plans were made to extend the line from Yangyang to Pohang, but Japan's defeat in the Pacific War and the subsequent collapse of the General-Government of Korea prevented completion of the extension.

[1] In 2007, after the reconstruction of the disused section between Kamho and Jejin, passenger trains began operating from the south to bring southern tourists to the Mount Kŭmgang Tourist Region.

[2] More than one million civilian visitors crossed the DMZ until the route was closed following the shooting death of a 53-year-old South Korean tourist in July 2008.

[3] Plans are being considered which would see the line become part of a trans-Korean line from Pohang to Tumangang, to connect South Korea's railway network to the Trans-Siberian Railway.

[2] A yellow background in the "Distance" box indicates that section of the line is not electrified.