Cars heading south bound will run into a cruiser parked on a sideroad right after they crest the hill coming south over the overpass. Posted speed is 70km/h on this stretch of road. Usually they are there in the morning rush hours. I have seen them parked on the north side of the overpass as well catching cars coming north during the evening rush hours. Slow down as you crest the hill and watch the tail lights of the cars at the top of the hill. It’s usually a good indicator.