Yes, unfortunately, the entire part of the motorway needs to be replaced.
O.K. I drove that stretch, east bound, this afternoon. So i have a GPS trace i can use, and combine that with Bing images for the west bound side.
the nodes _and_ the way. (Don't forget to make new intersections. If you simply delete the way, all nodes on intersection will not get deleted.)
That is a nice thing about motorways, very few intersections. So i don't think this is a problem in this case. But i will check.
Thanks for the explanation,
Andrew