That's what I don't get about this highway. They claim that it is a bypass for 401/400, but we have that bypass already - it's called the 407. And it already connects all the commercial / industrial parks of Markham, Vaughan, and Brampton to 401 in the west and east (via 412).
However, businesses and trucking companies just don't want to pay 407ETR tolls (just take the highway any day of the week and this is self evident) and might be more inclined to take cheaper government tolls. This fact makes me a little skeptical about the whom was really pushing this highway and it's necessity.
There is also all the developers who look at this highway and salivate over all the opportunities it opens in North Vaughan, Bolton, Caledon, Georgetown, Orangeville, Milton, etc.