Broad Gauge Metallurgy Line (Polish: Linia Hutnicza Szerokotorowa, LHS), is the longest broad gauge railway line in Poland. Except for this line and a few very short stretches near border crossings, Poland uses standard gauge. The single-track line runs for almost 400 km from the Polish-Ukrainian border crossing just east of Hrubieszów to Sławków Południowy (near Katowice). It is used only for freight, mainly iron ore and coal.