Deepest road tunnel

The Eiksund road tunnel in Norway connects the Norwegian mainland with Hareidlandet island. The tunnel is 7,765 metres (25,476 feet) long and achieves a depth below sea level of 287 metres (942 feet) below sea level. The tunnel was opened in 2008 and cost half a billion Norwegian Krona (approximately 53 million GPB). The tunnel carries approximately 1,000 vehicles each day of which half are commercial trucks. The tunnel is unique in that it carries a steep gradient between its deepest point and its exit of 9.6%, almost twice the allowable gradient for such tunnels in the European Union. This new tunnel beats the previous record holder (also in Norway) by over 20 metres.