Bispelokket (literally "bishops lid") was a Norwegian three-level stack interchange roundabout in Bjørvika, Oslo. European Route E18 and Norwegian National Road 162 (until 2010: National Road 4) jointed at this point, which also served as the official traffical centre of the city. The new roundabout at Postgirobygget is from October 31, 2011, the new traffical centre of Oslo.