The Thunder Bay Expressway plan consultants held an open house last week, and they published the schematics from the 1990s plans to develop interchanges along the expressway. The PDF file that contains them is over 80MB in size (due to using an aerial photo mosaic as a backdrop) so I cropped the individual interchanges out. North is toward the top right corner in each image.
All of these are plans from the early 1990s, so they're not necessarily what will be built.
Travelling from South to North:
Arthur Street Intersection, a diamond interchange was proposed.
Harbour Expressway Intersection. At the time this plan was drawn up, the Shabaqua Extension (the road heading toward the top of the image) had yet to be built.
Northwest Arterial, a road that has yet to be built or even named but was proposed back in the 1970s, would replace the intersections at John Street and Oliver Road (which would become flyovers).
Red River/Dawson. Work had actually started on this interchange just before the 1995 election, and after the PCs won it was cancelled. They got as far as demolishing houses and cutting down trees to build ramps. The trees have since grown back...
Balsam Street. Just to the right of the image, the current divided highway begins, which is why the study ends here. This interchange would re-route Balsam to connect directly to Wardrope Avenue, which itself eventually bends to connect to the Northwest Arterial, forming a sort of ring road around the northwest part of the city.
The entire route will be a divided four-lane road heading south to the airport. Traffic projections show that six-laning isn't warranted, the road isn't projected to reach capacity until the mid 2040s. The right of way is wide enough for a 6 lane road along its entire length, and up to 8 lanes in a few spots.
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This was after the concrete had just been poured (and therefore would likely still bleed a little) and was a picture from a rainy day! 
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