Are Radar Detectors Worth It? And Are They Legal? – SlashGear

For starters, drivers in Mississippi and Virginia shouldn’t purchase or install a radar detector in their car for any reason. State law in both of these parts of the country prohibits the use of radar detectors, and can result in even higher fines or even a mandated court appearance. However, drivers across the rest of the United States can make use of radar detectors if they desire. 

Once again, it’s important to note that if you do deploy this tool (outside of those states), and have a reason to drive through Mississippi or Virginia, you’ll need to remove the device from your car before crossing the state boundary. It’s illegal not only to use a radar detector, but to carry one in Mississippi and Virginia as well.

Commercial drivers are also unable to carry or use a radar detector in their vehicle. This is regulated by federal law, and therefore applies across the country, no matter what state you call home. Lastly, many states prohibit the use of radar detectors in school zones, construction areas, and other similarly regulated spaces. Checking with your local guidelines can help prevent unwanted complications in states where it’s legal to use them.