Mastrafjord Tunnel
The Mastrafjord Tunnel is a subsea road tunnel in Rennesøy municipality in Rogaland county, Norway. The long tunnel runs under the Mastrafjorden, which flows between the islands of Mosterøy and Rennesøy. The tunnel opened in 1992 as part of the European route E39 highway and the Rennesøy Fixed Link. The southern end of the tunnel is located near the village of Askje on Mosterøy and the northern end of the tunnel is in the village of Vikevåg on Rennesøy. With a maximum grade of 8%, the tunnel reaches its deepest point at below sea level.
