Down in Calgary, do they not have the intersections with the advanced warning of a light about to change to red? Isn't that the same with seeing a police car, only you don't have to come to a complete stop. Furthermore, I am just taking a wild stab in the dark, but if a police officer is going to make a traffic stop, he is probably going to wait until he's in an area where traffic behind him can see him well. I can't see them trying to stop a car on a curve where traffic can't see him until they are right on top of him.
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