The Uzhhorod–Košice broad-gauge line is a single-track 1,520-mm-gauge railway mostly in eastern Slovakia, which is used especially for transporting iron ore from Ukraine to the steel works near Košice.

In the 1960s, after construction of the steel works in Košice, imports of iron ore to Slovakia rose steeply, and the checkpoint in Čierna nad Tisou could not handle this volume, particularly in winter, as Czechoslovakia and the Soviet Union had different gauges and all freight had to be transshipped.

Trains are hauled by two electric twin-unit locomotives, similar to the late versions of PKP's ET40 but with SA3 couplers instead of buffers and chain couplings, except of westbound between Trebišov and Ruskov where the gradient is over 15 ‰ and two sets of locos are needed.

In November 2010, the Slovak Prime Minister Iveta Radičová announced the Slovak government will not support the project, as it threatens the viability of the Košice area workplaces in the Dobrá bulk terminal, which would be unnecessary after the completion of the project.

[4] It will prove important (if really built) for the transport of containers, between Western Europe and Russia and China.