What is the primary function of stationary RADAR?

The primary function of stationary RADAR is to measure speeds of approaching and retreating vehicles. This technology utilizes radio waves to detect the speed of vehicles as they move towards or away from the RADAR unit. It works by emitting a signal that reflects off moving objects and returning that data to calculate their speed based on the Doppler effect.

This capability is particularly significant for law enforcement and traffic management, as it allows authorities to monitor and enforce speed limits effectively. Accurate speed measurements help ensure road safety and compliance with traffic regulations.

The other choices do not accurately capture the core function of stationary RADAR. While tracking stationary objects may seem relevant, RADAR primarily focuses on moving entities. Calculating average speed limits involves different methodologies and considerations outside the primary capabilities of stationary RADAR. Finally, detecting vehicle types requires different technologies and criteria, as RADAR does not inherently identify the classification of a vehicle. Therefore, understanding that stationary RADAR is specifically designed for speed measurement is crucial.