It looks like a pontoon bridge, which is in the water.
Those are often used as a temporary solution and can be taken out without leaving (many) traces when no longer needed.
They are also easier to put in than other kinds of bridges.
As the pontoons are in the water and the road surface only a bit above, it blocks all traffic on the water, so usually there is a part that can be floated away to let shipping go through. But it is not the easiest thing and mostly pontoon bridges are not kept longer than needed.
I bet that you will not find this bridge on photos of an other year, maybe not even from an other month, week or even day.
It may be that the ferry was out of use or that there were other problems which made for a need for a temporary bridge. And seeing the amount of trucks I think that is proven.
In an other answer is mentioned that this is/might be a new connection, meant to be a long term feature.
(Answer edited based on the answer by Andrew.)