How does a police officer enforce speed laws?

Traffic enforcement regarding speed laws is primarily achieved through the use of radar or lidar devices. These devices measure the speed of moving vehicles accurately and provide law enforcement with instantaneous data about a vehicle's speed. Radar works by sending out radio waves that bounce off a moving vehicle, while lidar uses laser beams for precise measurement.

Using these technologies allows officers to enforce speed laws efficiently and objectively, enabling them to identify violators without the subjective impact of human judgment. This often results in a more accurate assessment of whether a vehicle exceeds the speed limit compared to other enforcement methods. By having evidence of speeding, officers can issue citations or take other enforcement actions as necessary.

Other methods mentioned, while they may have their uses in certain situations, do not provide the same level of accuracy or objectivity as radar and lidar, which are specifically designed for speed enforcement.