What type of speed measurement device uses laser technology?

Lidar, short for Light Detection and Ranging, utilizes laser technology to measure speed. This device emits laser beams and measures the time it takes for the beams to bounce back from a moving object. By calculating the time delay, Lidar can determine the distance to the object and, consequently, its speed. This technology offers high precision, making it highly effective in speed enforcement scenarios.

Other devices mentioned in the choices employ different technologies; for example, radar uses radio waves to detect speed, while pace involves a physical measurement method based on timing a vehicle’s travel over a known distance. VASCAR (Visual Average Speed Computer and Recorder) combines visual observation with a timing mechanism but does not use laser technology. Hence, Lidar is the only device in this context that specifically employs laser technology for speed measurement.