The Gyeongbu Line (Gyeongbuseon) is a railway line in South Korea and is considered to be the most important and one of the oldest ones in the country. It was constructed in 1905, connecting Seoul with Busan via Suwon, Daejeon, and Daegu. It is by far the most heavily travelled rail line in South Korea. All types of high-speed, express, local, and freight trains provide frequent service along its entire length. From Wikipedia
