Can police speed

Police officers are supposed to follow the same rules as the rest of the drivers on the road *unless* they have their lights/sirens on.

At that point, it is up to the police officer to judge, based on the situation and road conditions, what a safe speed is (in other Words, they don't have a speed limit at that point, other than their own judgment.)

Of course, the old saying goes "You may out run the cop, but you can't out run motorola"