The Busan–Gimhae Light Rail Transit is a light metro system between the cities of Busan and Gimhae in South Korea. The line has 21 stations including Daejeo and Sasang where passengers can transfer to Busan Metro Line 3 and Line 2 respectively. The line thus acts as a connecting rail between both Gimhae and Busan International Airport with two western outreaches of the Busan Metro system.

A medium-capacity system (MCS), also known as light rapid transit or light metro, is a rail transport system with a capacity greater than light rail, but less than typical heavy-rail rapid transit. MCS's trains are usually 1–4 cars. Most medium-capacity rail systems are automated or use light rail type vehicles.