The Lötschberg Base Tunnel (LBT) is a 34.57-kilometre (21.48 mi) railway tunnel on the BLS AG's Lötschberg line cutting through the Alps of Switzerland some 400 m (1,312 ft) below the existing Lötschberg Tunnel. It is currently the world's longest land tunnel (except for some metro tunnels) and accommodates passenger and freight trains. It runs between Frutigen, Berne (46.5787°N 7.6491°E / 46.5787; 7.6491 (Lötschberg Base Tunnel, northern portal)), and Raron, Valais (46.3091°N 7.8316°E / 46.3091; 7.8316 (Lötschberg Base Tunnel, southern portal)). Breakthrough was in April 2005 and construction ended in 2006. The opening ceremony was in June 2007. Full scale operation began in December 2007.
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