There is a sharp dip in the road. If you are traveling slightly under 25 mph (the speed limit) and take your foot off the gas your vehicle will be going slightly over 25 for a few seconds before the sharp rise slows you down. In that few seconds that the speedometer needle hits 28-29 mph they got’cha.
You’ve got to touch the brake pedal once or twice on the dip to keep it under 25. Still, they might say you were doing 35.