What is the function of a radar gun in traffic enforcement?

The function of a radar gun in traffic enforcement is to measure the speed of a moving vehicle. This tool uses the Doppler effect, which calculates the change in frequency of radar waves reflected off a moving object, to determine how fast a vehicle is traveling. This speed measurement is crucial for law enforcement as it helps ensure that drivers adhere to speed limits, thereby promoting safety on the roads. By accurately measuring speed, officers can identify potential violators, enforce traffic laws, and contribute to overall traffic safety.