Korea Railroad Corporation, promoted as Korail,'s the national railroad operator in South Korea. Korail operates passenger and freight trains throughout South Korea. The railroad's headquarters are located in Daejeon. Lines Korail operates all of long distance lines in South Korea, as well as most of local lines. Gyeongbu Line with its high-speed parallel line, running between two largest cities Seoul and Busan,'s by far the most heavily traveled line. Other main lines include Honam Line and… (More on Korail)