Another thing that gets my goat when driving, is the Peter Brocks who pass you on the left. It's easy to go over the limit when you drive right on the speed limit, particularly when there are rises and depressions in the road. So I drive at about 5 km under the limit, whether it is 60, 70 or 80, and in unsignposted streets, the assumed limit is 50.
So when you are driving along a road that has one lane plus a parking or bus lane, these leadfoots pass you on the left any time there is a gap in the parked cars, at speeds well over the limit, only to be stopped at the next set of lights, where you catch up with them. They gain absolutely nothing. And you often have to brake hard when they pull out in front of you from behind a parked car.