A Great radar detector Resource. radar detector On US armed forces bases, they are lawful to have but illegal to use. Radar jammers are illegal in the states of Utah, California, Oklahoma, Colorado and Nebraska. A radar detector can help you avoid costly speeding tickets. But first, consider your driving habits and try and avoid the necessity for having one at all. radar detector NOT GETTING CAUGHT TOP FIVE THINGS YOU NEED TO KNOW BEFORE BUYING A RADAR DETECTOR A radar detector is a special device used in an vehicle by drivers in determining if their speed is being monitored by local law enforcement officials. The term 'radar detector' in point of fact comes from earlier speed-detection technologies that used radio waves, which were bounced off moving vehicles with a device whereby police could determine if a persons speed was what it should be. You should always try and determine whether a radar detector is legal where you live, and if not, consider your actions carefully. rate radar detector