The Toronto Transit Commission is starting an interesting experiment on it’s St. Clair street car line: the Time Based Transfer. Transfers on the line are now valid for up to two hours after you disembark the vehicle, and will allow you to board any other TTC route, including the one you just departed. See a trendy cafe from the window? Need to do some shopping? Now you can do it all on one ride.
This seems like a good way to encourage people to use Transit for their non-commuter needs. If successful, the word is that these transfers will be expanded to the entire network.