Vehicle · Radar detectors
Are Radar Detectors Legal in California?
Whether a radar detector is legal in a private passenger car in California, the penalty if it is not, and the separate federal ban that applies to commercial trucks everywhere. Cited to the statute.
What the radar detector law says in California
The rule for a private passenger car, and the situations where it is different.
| What the law says | What it means |
|---|---|
| No state ban | California Vehicle Code Division 12 covers vehicle equipment in detail, and no chapter or section prohibits a radar detector in a private passenger car. There is nothing to cite as a ban because the law does not create one. |
| Keep the windshield clear | Vehicle Code Sec. 26708 limits objects placed on the windshield that obstruct the driver view. That is the one practical limit: mount the detector on the dash, low corner, or elsewhere out of your sight line rather than in the middle of the glass. |
| Where it is different | What it means |
|---|---|
| Commercial vehicles | Radar detectors are barred in commercial motor vehicles under federal law, and California drivers of those vehicles are covered by that rule regardless of the passenger-car answer. |
| Radar jammers are different | A detector only listens for a signal and is legal. A jammer actively interferes with police radar, which is a separate matter barred under federal law. Do not confuse the two. |
What you can do right now
Concrete, neutral steps for using or carrying a radar detector in California. This is legal information, not legal advice.
- Mount it off the windshield
To stay within Vehicle Code Sec. 26708, place the detector on the dash or a low corner where it does not block your view, not in the center of the glass.
- Keep it out of commercial vehicles
If you drive a commercial motor vehicle, do not carry or use a detector. That is barred under federal law no matter what the passenger-car rule says.
- Do not buy a jammer
A passive detector is fine. A device that jams or interferes with police radar is a separate federal matter. Buy a detector, not a jammer.
- Check the rules before you cross state lines
Detectors are legal in California, but not everywhere. Before a road trip, confirm the rule in each state you will drive through, especially Virginia.
If you were cited over a radar detector, a local traffic attorney or public defender can explain how the charge is handled and whether the device can be reclaimed.
→ California Department of Motor VehiclesThis is general legal information, not legal advice. Rules for commercial vehicles and window mounting can differ, so confirm your situation against the statute.
What drivers in California get wrong about radar detectors
Radar detectors are legal in California for private passenger cars, and the reason is straightforward: no state law bans them. California Vehicle Code Division 12 sets out the state rules for vehicle equipment, from lighting and brakes to windshields and mirrors, and nowhere does it prohibit a device that detects police radar or laser. So the honest answer is not that a statute permits detectors, it is that no statute forbids them. The one practical limit comes from a general rule, Vehicle Code Sec. 26708, which restricts objects on the windshield that obstruct the driver view. That affects where you mount a detector, not whether you can own or use one. Keep it off the center of the glass and you are fine. Two things to keep separate: commercial motor vehicles are barred from detectors under federal law, and radar jammers, which actively interfere with police equipment, are a different and prohibited category. For an ordinary car, a plain detector is allowed.
Common questions
Are radar detectors legal in California?
Yes. Radar detectors are legal in California for private passenger cars. No state statute bans them. The only limit is the general windshield-obstruction rule in Vehicle Code Sec. 26708, which affects where you mount one.
Where can I mount a radar detector in California?
Anywhere that does not obstruct your view of the road. Vehicle Code Sec. 26708 restricts objects on the windshield, so mount the detector on the dash or a low corner rather than the center of the glass.
Are radar detectors illegal in commercial trucks in California?
Yes. Federal law bars radar detectors in commercial motor vehicles in every state, including California, under 49 CFR 392.71. That is separate from the passenger-car rule.
Are radar jammers legal in California?
No. A radar jammer actively interferes with police radar and is a separate, prohibited category under federal law. A passive detector, which only listens, is legal in California.
Can I get a ticket just for having a radar detector in California?
No. Possessing or using a detector in a private car is legal. You could be cited under the windshield rule if it blocks your view, but not for the detector itself.
Not legal advicePlainStatute provides plain-language summaries of public law for general information only. This is not legal advice. Statutes change; always confirm current requirements with the official source linked above before acting.