Downtown Plainfield has cops that sit inbetween the little shops and buildings looking for speeders. The limit is 25mph and increases to 35mph the closer you get to Van Dyke Road. I got a ticket on Rt 30 one day and the next two days I saw the same cop radaring in a different spot between the buildings. The cop vehical was a blazer type. I have a radar detector and it did not go off until I was on top of the cop.