The PIT maneuver, or precision immobilization technique, is a pursuit tactic by which a pursuing car can force a fleeing car to abruptly turn sideways, causing the driver to lose control and stop. Other names include pit block, pit stop and blocking. It was developed and named by the Fairfax County Police Department of Virginia, United States. Other interpretations of the acronym "PIT" include pursuit immobilization technique, pursuit intervention technique, push it tough, parallel immobilization technique, and precision intervention tactic. The technique is also known as tactical car intervention, tactical ramming, legal intervention, and fishtailing. The technique is typically used by law enforcement officers as a safer alternative with which to bring car chases to a conclusion.
Other methods of stopping a fugitive vehicle include tactical pursuit and containment (see below) and the use of spike strips.
Attempting the PIT maneuver against a motorcyclist is extremely dangerous and prohibited in most countries.
The PIT maneuver was adapted from the bump and run technique used in , where drivers would bump a competitor to take them out, giving rise to the term, "takeout". This maneuver is illegal in stock car racing because it is very dangerous. The high speed involved in auto racing makes it much easier for drivers to take out another car with a less substantial bump than at lower speeds. When employing the PIT maneuver, the speed of the two cars involved will determine how far the car will travel once it is bumped. Partially for this reason, the higher the speed, the more unpredictable and dangerous the PIT maneuver becomes. This is just one of the very important factors a police officer must consider before implementing the PIT maneuver. A police officer is trained to wait until conditions are right before attempting a PIT maneuver to avoid the use of deadly force. Speeds must be lower and the "landing site" for the bumped vehicle must be clear of danger.
The first US law enforcement agency to teach PIT as a technique to halt fleeing vehicles was the Fairfax County Police Department in Virginia, which modified the parameters for initiating and executing the technique for police use. Terry Pearson and Joseph McDowell were the first law enforcement officers to incorporate the technique into training. Terry Pearson named it the "Precision Immobilization Technique" or P.I.T.