I meant empty as in void of a destination, what they have now, it's just simply going to be thoroughfare.
Maybe it was a requirement of the city to build it this way, and for some reason, every PATH segment in Southcore has been at-grade/above ground. Around the same time however the city approved a ~150 meter underground extension for the Northwest PATH. So what's the deal? Southcore land is virtually empty, I do have good reason to believe it would cost significantly less than digging up York St...
This will be like the Skywalk PATH segment that crosses the tracks to MTCC. There isn't really anything especially interesting about it. The foot of the Skywalk that goes along Front St, is often used as convention space, but the bridge itself is almost used for nothing except walking through.
And I'm struggling to see why installing a Gardiner tunnel a few extra feet deeper would materially change anything, the underground parking from condos further west (The Yards @ fort York, Panorama, Amsterdam Brewing) would impede digging immediately below street level sooner than this would