Local police regularly post speed traps on Boston road between I495 and Westford Center. The speed limit is an unrealistic 30mph, with most traffic driving at around 40mph. Cruisers post on the berm around the large, uphill bend, and also on Crown Road and in the parking lot of the Westford Historical society. Radar is K band, operated either continuously or occasionally as "instant on". Traps are more common at night.