The Suseo High Speed Railway (Suseo HSR) is a high-speed railway under construction from Suseo in southeast Seoul to a junction with the existing Gyeongbu High Speed Railway in South Korea. The line will become part of SR's Korea Train Express (KTX) system, and will provide an alternative Seoul terminus for Gyeongbu KTX and Honam KTX services to Mokpo and Busan at the Seoul end.