Imagine this, instead of building a highway, you build a railway with frequent trips that connects with the existing GO transit stations. Or imagine this instead of just having a full 3 lane highway, you build one that has maybe 2 lanes for cars and one for rapid bus transit that doesn't have to deal with cars and traffic. with limited stops (that connects with other transit hubs). OR IMAGINE, having a mix of the 3. 1 train that goes fast and stops at maybe 3-4 stops. A rapid transit bus that connects to stops in between and a lane or 2 for cars.
Obviously this isn't happening in a GTA near you. This highway is more a vote-getter than a thoughtful addition to our infrastructure.
In the end as we keep developing that area, you will get more cars taking that highway, who will end up being stuck on the southern highways (401, 427, 404, 400, etc) and that will just keep making the situation worse for everyone