After opening in 1992, and until 2004, the T1 tram line was originally operated using high-floor ABB light rail vehicles (LRVs). Stating in 2004, the original LRVs on the T1 line were replaced by low-floor trams, first from Bombardier, and later from Alstom Citadis. However, the T4 line still operates using high-floor ABB LRVs.