Which speed measurement method allows officers to measure a vehicle's speed while in motion?

Moving radar is a speed measurement method that allows officers to measure the speed of a vehicle while both the officer's vehicle and the target vehicle are in motion. This method utilizes radar technology that can accurately determine the speed of a vehicle in relation to another moving vehicle.

In moving radar systems, as the officer's vehicle travels, the radar emits signals that bounce off the target vehicle and back to the radar unit. The system calculates the speed of the target vehicle based on the Doppler effect, which refers to the change in frequency of the radar signals as they reflect off the moving vehicle.

This capability is significant because it enables officers to monitor traffic conditions and target speeders without having to rely on stationary setups, allowing for a more dynamic and responsive method of traffic enforcement. Other methods mentioned, such as stationary radar or pacing, have limitations that prevent them from measuring speed while both vehicles are in motion.