Which concept refers to the confirmation of a vehicle's velocity through direct observation?

The concept that refers to the confirmation of a vehicle's velocity through direct observation is commonly known as pacing observation. In this method, an officer will drive a patrol vehicle at a speed that matches the speed of the target vehicle for a sustained period. This direct observation allows the officer to determine the speed of the vehicle with a considerable degree of accuracy, as the speedometer of the patrol vehicle provides a real-time measure of speed. It is particularly useful in situations where radar or laser technologies may not be available or practical to use.

Pacing observation relies on the ability to maintain a consistent distance from the target vehicle, ensuring that the speeds can be accurately assessed. This method also introduces an element of visual confirmation, as the officer is actively engaged in assessing the speed rather than relying solely on mechanical devices. It reinforces the understanding that direct, first-hand measurements can be a valuable tool in traffic enforcement scenarios.