Inside the world’s deepest and longest subsea road tunnel

The Rogfast tunnel, set to become the world's longest and deepest subsea road tunnel, is under construction beneath Norway's fjords. This ambitious project will span 26.7 kilometers (16.6 miles) and reach a maximum depth of 390 meters (1,280 feet) below sea level, dwarfing the current record holder, the 14.4-kilometer Ryfylke tunnel. The construction involves significant use of explosives to blast through rock walls, with the deepest point experiencing over 500 pounds per square inch of pressure from the seawater above. Geologist Anne-Merete Gilje and tunnel foreman Niclas Brusehed of Implenia are involved in the project, highlighting the challenging and unique lifestyle required for such underground work. Norway's expertise in subsea tunnel construction has drawn international interest, with representatives from Japan, Spain, Morocco, and several US states scheduled to visit the Rogfast site in May to learn from their engineering capabilities. The project aims to demonstrate that large-scale, ambitious engineering feats are still achievable.