The Elbe Tunnel in Hamburg is experiencing significant disruptions due to a strike by ver.di union members in the control center, leading to the closure of one lane in each direction until Tuesday morning. This action coincides with a full closure of the A7 motorway between Hamburg-Stellingen and Hamburg-Heimfeld, including the Elbe Tunnel, from Saturday evening at 10 PM until Monday morning at 5 AM. The complete closure is necessary for the installation of three new traffic sign gantries and to advance the construction of the Altona noise protection tunnel. Authorities advise using public transport and have established detours via the A1, A21, and B205 for through traffic, while inner-city diversions will utilize the Elbe bridges. The union defends the strike's timing, citing a lack of progress in national wage negotiations with the Autobahn GmbH.