I have to add that, as a rule of a thumb, a drive (even with parking) for two people typically costs about the same with transit, and it is outright cheaper with more than two in a car (read: a family).

 Even worse, by my math TTC emits the equivalent of 1 litre of gas per passenger trip, and GO emits two; so in some cases you may end up in a situation when taking a car emits less carbon. Yes, I know the logic that they'll run the bus/train anyways, but it is interesting to put things in perspective with the law of large numbers.