The Klokova Tunnel is a tunnel on the Ionia Odos motorway. It is built in order for the new motorway to bypass the Klokova mountain, which, until recently, was traversed by the narrow Greek National Road 5. Works began in May 2015 and were completed with the opening of the tunnel on 12 April 2017. As of 2016, the tunnel has been excavated in most of its length, much earlier that estimated.