By Keith Fender
Feature
In the first of a two-part feature, KEITH FENDER describes the planning and construction of the world’s longest and deepest tunnel
The 57km-long Gotthard Base Tunnel (GBT) under the Swiss Alps opened fully to both freight and passenger traffic on 11 December 2016. This was almost exactly 62 months after construction of the first raw tube of the tunnel had been finished when tunnellers met on 15 October 2010 south of Sedrun.
