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Radar Detector Legal States: Where Rules Differ

Radar-detector legality depends on the state, vehicle and circumstances. Verify current statutes and federal rules that may apply before installing or using a device.

Radar detector legal states are best checked through current primary legal sources, because rules may distinguish passenger cars from commercial vehicles and can change. This guide is a starting point, not a substitute for checking the law that applies to your trip.

Radar Detector Legal States: Where Rules Differ

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Common questions

Questions before you buy

Are radar detectors legal in every state?

Rules vary by jurisdiction and vehicle class. Check current state law and any applicable federal requirements for your vehicle.

Are radar detectors allowed in commercial trucks?

Federal regulation prohibits use of a radar detector in a commercial motor vehicle, subject to the regulation’s definitions and scope. Consult the current rule.

Can a state restrict where I mount a detector?

Separate vehicle-equipment or windshield-obstruction laws may apply. Verify the current state statute rather than assuming device legality settles mounting legality.

Where can I verify my state’s rule?

Use the official state legislature or state transportation agency website, and review federal regulations where commercial vehicles are involved.