[TimberTDI]

The bridge does have a purpose:

The massive undertaking will connect Berlin’s inland harbor with the ports along the Rhine river. The water bridge will enable river barges to avoid a lengthy and sometimes unreliable passage along the Elbe. Shipping can often come to a halt on the stretch if the river’s water mark falls to unacceptably low levels.
Barge captains will now be able to ship loads of up to 1,350 metric tons – the equivalent of 50 truckloads – over the 34-meter wide and 4.25-meter deep water bridge. Previously, ships could only be loaded with 800 metric tons.