Usually cars nowadays have GPS. A program that can be used through GPS is phantom alert. It actually works as a warning in where police radar traps would be. You have to remember that speeding can cost hundreds of dollars and this is the aim of the program which is to lessen the people being caught because of warnings over possible police detection. In contrast to radar detectors often not detect the new technology the police are using not like phantom alert. So it can be an advantage for people to get the Phantom alert to monitor their driving all the time.