The E39 highway in Norway runs along the west coast of the country and connects Kristiansand in the south to Trondheim in the north. There's also a ferry connection to Denmark that forms part of the route. The entire highway (excluding the ferry south to Denmark) is about 1,100 km. But it takes about 21 hours to drive it because Norway's dramatic fjords (see above photo) mean that there are seven ferry crossings along E39. The Norwegian government wants to transform the route into a ferry-free highway, which would dramatically reduce travel times. But this presents a number of extremely difficult engineering challenges -- some of which haven't been solved yet. You can learn about a number of them in the below video from The B1M. If you can't see it below, click here. It's a fascinating video.

Photo by Christiann Koepke on Unsplash