No it's not science-fiction. The time transfer pilot program for the 512 St Clair route introduced by the TTC will enable riders to get on and off at will - in both directions - during a two hour window.

Here are some of the details provided in the TTC's PDF:

New 512 St Clair Time Based Transfer Pilot Program

Starting Sunday July 31, 2005 the TTC will introduces a new time-based Transfer pilot program, which will continue until the end of the end o construction on the St Clair West Transit Improvements Project.

What is a time-based transfer?
A Time-based transfer allows you to travel for up to 2 hours on the 512 St Clair route. You can board a 512 St Clair streetcar or bus at any stop, in any direction, until the expiry time shown.

How do I use a Time-based transfer?
Keep and show your Time-based transfer to the Operator each time you board. On routes other than 512 St Clair, the transfer is valid at connecting route transfer points only, until the expiry time shown.

How long is a Time-based transfer valid?
The Time-based Transfer is valid until the expiry time shown.

Where do I get a Time-Based Transfer?
A Time-based transfer is only available from a 512 St Clair Operator.