Norway’s not the first place to come to mind when thinking about feats of engineering greatness. But in the coming years, the country could potentially boost its reputation with a giant new tunnel project.
Norway’s already home to the longest road tunnel in the world, so it makes sense that the country would want to take that a step further. The proposed tunnel would run a little over 500 miles from one of its southernmost cities (Kristiansand) to a northernmost one (Trondheim), but below the surface of the Norwegian Sea. It would consist of large Chunnel-like suspension tubes, hanging 100 feet below the surface of the water. Each tunnel would be equipped to manage two lanes of traffic and have two sides—each going in a separate direction.
The project’s still in its infancy, so there’s no official word from the Norwegian Public Roads Administration word on whether it’s a go just yet, but it’s projected to cost an estimated $25 billion and would be completed by 2035.
Take a look at a conceptual rendering of the tunnel below.