What is the term for braking just short of the brakes locking up?

Answer: B — Threshold braking

Threshold braking is the technique where the driver applies the brakes as firmly as possible without causing the wheels to lock up. This method is crucial in maintaining vehicle control, especially during emergency situations or when quick stopping is necessary. By stopping just short of locking the wheels, the driver maximizes the available traction, allowing the car to come to a halt more effectively while still being able to steer if needed. This technique is particularly important in high-performance driving situations or when driving on slippery surfaces, where maintaining traction is essential for both stopping distance and steering control. Proper application of threshold braking can significantly enhance safety and driving effectiveness in law enforcement scenarios.