The Ryfylke Tunnel is an undersea road tunnel in Rogaland county, Norway. It is part of the Norwegian National Road 13 running between Stavanger and Ryfylke (district) under the Horgefjord. The tunnel is part of the Ryfast project. It is 14.4 kilometres (9 mi) long and is currently the world's longest subsea road tunnel, and the deepest tunnel of any kind. Both records are expected to be surpassed by Rogfast, which is projected to open in 2033.