Police radar is a device used by law enforcement to detect the speed of moving vehicles. It works by emitting radio waves and measuring the frequency of the waves that bounce back from the vehicle. If the frequency of the reflected waves is different from the frequency of the emitted waves, it means that the vehicle is moving. The difference in frequency is proportional to the speed of the vehicle.
There are a number of ways to avoid police radar. One way is to use a radar detector. Radar detectors are devices that can detect the presence of police radar and warn the driver. Another way to avoid police radar is to drive within the speed limit. Finally, drivers can also avoid police radar by being aware of the locations where police radar is typically used.