I have noticed enforcement, mostly at night, but that may be just because that is when I have been there. The speed limit along the North Shore is confusing, going from 35 to 45 and back, over and over again. In one place the speed limit goes to 45 mph for about 300 feet. At the Haleiwa bipass, the speed limit going towards Haleiwa (from the Dole plantation) is 45 mph, while the speed limit in the same place going away from Haleiwa is 35 mph. There is a reduce speed limit sign to 35 mph going away from Haleiwa, indicating that at some point in time the speed limit was 45 mph. It makes you wonder if the cops took down the 45 mph sign that is supposed to be there. The cops sit on the North side of the rode, after it widens out and you think you are on a highway, instead of a coastal rode.