In Switzerland, freight traffic is handled at the three large marshalling yards Basel-Muttenz, Zurich-Limmattal and Lausanne-Triage. These marshalling yards are operated by SBB Infrastructure. The Gotthard line is SBB Cargo's main transit route. The second transalpine axis through the Lötschberg and the Simplon tunnel is used primarily by competitor BLS Cargo but also by SBB Cargo trains