Just routine maintenance.
There was a number of problems with the old surface of the bridge. Colors were bad - plus the biggest problem was the strength of the old surface. In fact, the old surface was cracking and falling to pieces.
So, the Toon Bridge is getting a new surfacing. Just like the highway department does to road bridges. The concrete was removed down to the supports, and a new surface has been poured - which looks ALOT better and will last much longer than the old one.
The whole bridge should be back open in the next few days.