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I can't quite see it in the picture, but I assume it's in the centre--probably subsidence, could be from the recent works or an older spot that was missed. Things like this are fairly routine 'snagging' issues in traffic schemes. It's a little surprising in such a big scheme, but I didn't follow it and don't know what the scope of the work was. They should still have a small budget for things that arise after the scheme has opened. Then again ...
You can see the steep angle of the road marking from this point of view.