TOareaFan
Superstar
There is talk of providing "tap off" locations at York Univeristy station, and provided you "tapped on" at Steeles West, highway 407, Downsview park, or Vaughan Centre immediately after transferring from another carrier (meaning a tap on another bus service in the last 2 hours or something), you would have your TTC fare placed back on your PRESTO card.
bit of a logistical nightmare, I guess, that would either be a lot of people lined up to tap off or a lot of tap off machines!