[niwell]

Granted this plan was shelved slightly before the Spadina debacle, but the intersection of College and Grace was once planned to be a major interchange. Pretty sure the west end wouldn't have the same cache as it does now if that was paved over.

Also the eastern extension of the Gardiner would have demolished a significant number of rowhouses which are fairly unique in Toronto (on Logan and other side streets in south Riverdale). And probably some of the warehouse buildings on Carlaw which are becoming fairly popular. These things don't come back.

And for the record traffic in Scarborough is actually pretty good due to the dense arterial road network and the width of Kingston Rd east of the Danforth split. It's transit neglect is another story, but having been to every corner of the 416 from downtown (for work) via transit it's still not too bad. The worst by far to access from downtown is northwest Etobicoke.