Oddernes tunnel and the Banehei tunnel are located on the E18 in Kristiansand kommune. Average annual daily traffic for both of the tunnels is 50 000. The tunnels shall be upgraded in accordance with the Tunnel Safety Regulations. In this connection, some rehabilitation of the tunnels shall also be carried out. Most of the work is described as turnkey contract, but there are also some quantity regulated items for work notifications, permanent signs, VF insurance and securing of rock support.