This might just be my mind playing tricks on me, but I swear they do. I tend to judge lights, like most others I imagine, by looking at the crosswalk symbol. Downtown they turn yellow as soon as it goes to the solid hand, but they have the timer on it to let you know how long that's going to be. Lights without the camera elsewhere seem to turn yellow well after the hand goes solid, and the yellow light lasts a decent amount of time. I'm not sure exactly how long as I've never actually timed it.
With red light cameras they seem to all turn yellow as soon as the hand goes solid, and the yellow light seems to last half the time it does elsewhere. Does anyone have any actual numbers for this?
Before anyone asks, I didn't get a ticket. Just got a little angry about it on crowchild yesterday. Going exactly the limit, watching that hand, and I had to hit the brakes pretty hard as soon as it turned solid. I was sure there wasn't anyone behind me, but there was a bit of ice, so if there was someone behind me they could have rear ended me as well. If I kept on going I would have entered on red for sure.