The Austrian road safety legislation requires formal approval of new tunnels as well as tunnel rehabilitation projects by the ministry of transport, infrastructure and technology. Approval is required for the basic design (STSG §7) as well as the final design prior to commissioning (STSG §8). In this regard and on behalf of the ministry, Lombardi SA has been mandated to establish safety expertises regarding the following tunnel objects: - Tunnel chain Klaus - Kaisermühlen Tunnel - Liefering Tunnel