Stagecoach Blvd, ~200 meters on the Clear Creek side of the Clear Creek / Jefferson County line.
As you are driving into CC county from Jefferson, you go down a large hill, speed limit 40. Half way down the hill you cross over into Clear Creek County & the limit drops to 30. There is a pair of roads that shoot off to the right and the cop sits at either of the two intersections. It is EASY to get tagged at over 50mph.