The Hanekleiv tunnel is a road tunnel in Vestfold, Norway, one of seven along the European route E18 between Sande and Holmestrand. The tunnel became the centre of controversy on 25 December 2006 when part of the roof collapsed, and investigations revealed that several tunnels on the E18 through Vestfold were insufficiently secured. The tunnel was fully reopened on August 30, 2007.