What is a common tool used in traffic law enforcement to detect violations?

Radar guns are a common tool used in traffic law enforcement to detect violations, particularly speeding. These devices use radio waves to measure the speed of a moving vehicle. When a police officer aims the radar gun at a vehicle, it sends out a signal, which bounces back off the moving car. The device calculates the speed by measuring the time it takes for the signal to return. This technology is effective because it allows law enforcement officers to monitor speeds without being in close proximity to the vehicles, ensuring both safety and accuracy.

Traffic cones, safety vests, and speed bumps serve different purposes in traffic management and safety but are not primarily designed for detecting violations. Traffic cones and safety vests are used to enhance visibility and direct traffic, often during construction or accident scenes. Speed bumps are physical road obstacles intended to reduce vehicle speeds in specific areas but do not provide a means of measuring violations. Therefore, radar guns play a crucial role in actively enforcing traffic laws by providing officers with the necessary evidence to take action against speed-related offenses.