Highway 7 - Kitchener to Guelph

[mpd618]

Can someone please enlighten me what the K-W to Guelph connection is other than the fact it's been talked about for decades?  I understand there's hype about change, super-structure-spaghetti-junctions, 10X millions of dollars in contracts (ie: job creation, etc), but can't quite get my head around what's being planned here, which in simple terms is basically a third way to get to Guelph, but why?

It's a limited-access expressway connection to Guelph rather than the current arterial road + rural highway + arterial road connection with its attendant traffic lights. It will have more capacity and higher speed, and it provides redundancy as well.