US 31 just north of the Grand River bridge, about 1/2 mile. A Grand Haven cop will sit in the median watching those heading NB. This is a situation where most of the traffic heading north just spent the last 5 miles in slow moving blvd town traffic where the posted limit of 35 is rarely reached. Once a motorist crosses the bridge the speed limit jumps to 70mph, but many impatient drivers seize the opportunity to bury the pedal. Also a note to SB motorist, a cop sits at the on-ramp on just over on the otherside, this is the on-ramp from Van Wagoner Rd.