South of 3 Mile on Plainfield, the speed limit drops from 40 to 35, then quickly to 30, which is not unreasonable there. Not long after this drop, you’ll sometimes see a Grand Rapids City police car sitting on a side road or in a parking lot, usually clocking southbound drivers, occasionally northbound ones. This became less common after this stretch of Plainfield became two lanes with a center turn lane, which slowed things down a bit.