That is, I believe
it was supposed to link up to Belmont. I've heard the Belmont thing from a few people. I still have never seen any primary sources about it. (Though, I've been limited to google searches.)
Since we're on the topic, here's my little fantasy reconstruction of the area.
*) Remove and naturalize one of Homer-Watson's carrigeways
*) Connect Greenbrook to Heiman, with a roundabout at Homer-Watson
There would be a 5-point partial roundabout to glue Highland/Homer-Watson/ramps-to-and-from-85 together. (go go MSPaint)
The two main high-volume movements you have to worry about here are:
1) Northbound H-W drivers turning left to 85 westbound, and
2) Westbound 85 drivers turning left to H-W southbound
Everyone driving into and out of the area bounded by Victoria, Courtland, the 85, and Westmount
Stirling Ave becomes a back street, connecting only minor areas together.
Residents of Highland Ave, as they take the brunt of traffic going north into the neighbourhood, who previously used Stirling or Courtland.
Residents of Heiman St, as they now become a street going somewhere.
Mill St will also see a bit of an increase of traffic, as people use it to get to Heiman/Greenbrook.
Clearly, this is entirely politically impossible.