The PIT maneuver, also known as TVI, is a law enforcement pursuit tactic in which a pursuing vehicle suddenly laterally strikes the side-rear of the pursued vehicle, thus causing the pursued vehicle to swing around and come to an unplanned stop. Ideally, forces of motion cause the struck vehicle to "pinwheel" around its own center axis and wind up facing the opposite direction of travel. The technique was developed in the late 1980s by BSR Inc., a law enforcement training center in West Virginia, and was first used by the Fairfax County Police Department in Virginia, United States, in 1988. Some law enforcement agencies use the PIT maneuver regularly to end vehicle pursuits; some use it only under certain conditions, and others avoid its use altogether for safety reasons.