Thanks for that. It's going to be a tight job and, as I suspected, no major re-alignment of Bayfield to accommodate a new bridge while the existing is still in service. Bayfield is fairly jammed at the best of time, especially in the summer, so it's going to be a place to avoid.I looked up the plans - see below. Basically all the houses on the east side of Bayfield south of the 400 are going to go bye-bye. Even with the expropriation though, it still looks like it's going to be a fairly complex replacement process with half of the new bridge built first, traffic shifted onto it, then the remaining half built, as it still partially overlaps with the existing bridge. The Shell gas station on the north side of the 400 is also getting expropriated.
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Dunlop has just as much if not more expropriation as well, taking out several plazas around the interchange.