Vereina Tunnel

The Vereina Tunnel is a railway tunnel, and the principal part of the Vereina railway line, in the canton of Graubünden in eastern Switzerland. It connects the Landquart–Davos Platz and the Bever–Scuol-Tarasp lines. First proposed during 1975, construction of the tunnel commenced during 1991 and was officially completed on 19 November 1999, ahead of schedule. In the first year alone, roughly 280,000 vehicles were recorded as having used the tunnel; since then, its usage has risen to around 450,000 vehicles per year. At 19,042 metres (62, 474 ft) in length, the Vereina Tunnel is the longest tunnel on the Swiss Rhaetian Railway (RhB) network as well as the world's longest metre-gauge railway tunnel.

Tunnel data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).