I just read the wiki article about Toronto’s streetcar line, and except for the odd track gauge, it doesn’t seem to be different than others. They’re apparently looking to replace the fleet sometime soon, and since several companies are being considered to provide the new cars, I can only assume that there’s no special requirements other than gauge and perhaps a special power pickup pole.
In this photo you can see a switch in the foreground. Though the left rail is too dark to really see, the right rail is clear. The switch is lined for car 4075 to come through (moving toward the camera.) If you look on that right side rail, where the track bends off to the right, you can see the movable switch point. It tapers down to its point, which faces us, and you can see the “notch” cut out of the pavement where that switch point would be if the track were aligned for car 4123 to come toward the camera.
Next time you’re out and about, see if there’s a similar ‘notch’ in the pavement, and if so, it’ll show you which part of the track moves.