QBC QBC:
I don't know how they'd build a bridge over there. The water is aweful deep in places and from what I remember, there is no route that doesn't have to span miles of very deep water.
Sure there is.
On the map I attached look at the route going across Horsehoe Bay and then hopscotching across Texada and Lasqueth Islands before landing on Vancouver Island. The bridges would all be less than 20km and that's been done before. If you go even further north you could cross at Campbell River and hopscotch across the islands there with shorter spans. This thing is that the further north you go the route is cheaper to build but impractical to use.
Or you could go south and build a bridge to the San Juan Islands to the mainland. That would probably be the cheapest route to go with but the politics of a Canadian route going through the US might prove tougher to conquer than the Strait itself.