Can radar detectors detect police cars?

Radar detectors can detect radar but not police vehicles . There’s a good chance the police car wasn’t radar-equipped (90 percent carry no radar). Or if it was, most officers shut off the radar while they’re out of the car on a traffic stop or when using it in instant-on mode.

With police radar, that moving object is your car. Radar units generate the waves with a transmitter . When they bounce back off your car, they are picked up and amplified by a receiver so they can be analyzed. The analysis is then reflected in a speed-readout device.

Police Officers Knowing if You Have a Radar Detector They give alerts to the driver of any police cars nearby or any speed guns waiting to catch speeding vehicles . In the right hands, such a device would be used by civilians who want to avoid nearby traffic or accidents, take quicker routes, get navigated, etc.