Linia Hutnicza Szerokotorowa
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.
Source: Wikipedia — Linia Hutnicza Szerokotorowa (CC BY-SA 4.0)