Rail transport in South Korea

Railways are a part of the transport network in South Korea and an important mode of the conveyance of people and goods, though they play a secondary role compared to the road network. The network consists of 4,285 km (2,663 mi) of standard-gauge lines connecting all major cities with the exception of Jeju City on Jeju Island, which does not have railways; of the network, 2,790 km (1,730 mi) are double-tracked and 3,187 km (1,980 mi) are electrified.

Source: Wikipedia — Rail transport in South Korea (CC BY-SA 4.0)