Küblis Bypass:
Tunnel Roughwork completed

The 3350 m long Küblis Bypass between Dalvazza and Prada in the Canton of Graubünden is intended to relieve the municipality of through traffic on the A28 national highway. The 2255 m long tunnel is the scheme’s main structure comprising 73 % of the entire Bypass route. It will accommodate two driving lanes with two-way traffic with a safety tunnel located at a distance of 30 m, which is linked to the main tunnel by means of cross-passages every 250 m. After two and a half years of excavation, the break-through took place in March 2013. This was followed up by initially developing the tunnel...