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Switzerland. Canton of Grisons. Sedrun. Two technicians from the AlpTransit Gotthard Ltd talk together inside a SBB CFF FFS wagon used for various tests operations in the Gotthard Base Tunnel. Tests are being conducted of the interplay between the various processes, systems and equipment, which include the track, overhead conductor, power supply, tunnel infrastructure, train control and safety systems, as well as operational communications. The Gotthard Base Tunnel consists of two 57-kilometres-long single-track tubes, including all cross-passages, access tunnels and shafts. With a rock overburden of up to 2300 metres, the Gotthard Base Tunnel is not only the world's longest, but also the world's deepest, railway tunnel constructed to date. Two multifunction stations, at Faido and Sedrun, divide both tubes into three approximately equally long sections. The multifunction stations each contain emergency-stop stations and two track crossovers. The Gotthard Base Tunnel will be officially opened on June 1, 2016, and for scheduled commercial services in December 2016. The Gotthard Base Tunnel is a major technical implementation for a new railway line. With the New Rail Link through the Alps (NRLA), important goals of Swiss transport policy can be implemented: transfer of goods traffic from road to rail, and improvements with quicker travel in passenger trafic. 10.03.2016 © 2016 Didier Ruef