Washtenaw County sheriff patrols wait somewhere along the stretch of McGregor that is in Washtenaw County because the speed limit there is 30 miles per hour. As you go along McGregor in Livingston County the speed limit is 45, so it drops 15 miles per hour.
They wait there daily, especially the morning and afternoon commutes with folks heading to Ann Arbor. I see someone pulled over there daily. The cops are having a field day with the increased traffic volume on McGregor due to the detour!