Usually an Explorer or Taurus in stealth livery will be parked adjacent to the southbound lane & near the crosswalk. Their intention is to ticket drivers going downhill on Farm St. as you will easily reach speeds of 60+mph if you don’t ride the brakes the entire way down. They will relay your position to other officers in nearby speedtraps in order to follow/ticket you. When I passed by, the Taurus made a U-turn to follow me while a hidden Explorer pulled out of Hemlock Rd. to do the same. They then proceeded to make turns away from me only to turn around to Nahant St. to follow me on Main St.