Most drivers wonder whether a radar detector can still be used on Minnesota roads now that the state enacted new legislation in early 2026. The short answer is yes – radar detectors are legal for passenger vehicles, but they remain prohibited for commercial trucks and are subject to stricter placement rules. The 2026 amendments clarified earlier ambiguities, reinforced exemptions for non‑commercial drivers, and introduced higher fines for violations involving commercial fleets.
2026 Legislative Changes
The Minnesota Statutes § 168A.02‑7 was amended in March 2026 to distinguish between passenger and commercial vehicles. The revision preserves the longstanding exemption for passenger cars and motorcycles while expressly banning radar detectors on any vehicle classified as a commercial truck, bus, or vehicle used for transporting goods for hire. The law also added a “visible mounting” requirement, meaning detectors must be installed where they can be easily inspected during a traffic stop.
Enforcement Practices
Law enforcement officers may request to see a radar detector during a stop if they have reasonable suspicion that it is being used illegally. For commercial vehicles, the presence of a detector is a direct violation, resulting in an immediate citation. For passenger vehicles, officers typically issue a warning unless the detector is obscured or installed in a prohibited location, such as the windshield.
Penalties and Defenses
- Passenger vehicles: A first‑offense warning; repeat offenses may incur a $150 fine.
- Commercial vehicles: A $250 fine per citation, and the detector must be removed on the spot.
Drivers can defend a citation by proving the detector is a permitted model (most modern devices are flagged as “passenger‑only” by manufacturers) and that it is mounted in compliance with the visible‑mount rule.
Practical Tips for Drivers
- Verify your vehicle classification on the Minnesota Department of Transportation website.
- Choose a detector listed by the manufacturer as “passenger‑only.”
- Install the device on the dashboard or center console where it is clearly visible.
- Keep proof of purchase and the user manual in your glove compartment in case of a stop.
- If you operate a commercial vehicle, remove the detector immediately to avoid fines.
Can I use a radar detector in a rental car?
Yes, provided the rental is a passenger vehicle and the detector is installed visibly. Rental agreements often prohibit modifications, so it is safest to use a portable, detachable unit.
Are there any states where radar detectors are completely illegal?
Yes. States such as Virginia, Washington D.C., and California ban radar detectors in all vehicles, including passenger cars. Minnesota’s law is more permissive after the 2026 update.
Does the law apply to laser detectors as well?
The 2026 amendment covers all speed‑measuring detection devices, including radar and lidar (laser) detectors. The same passenger‑vehicle exemption applies.
What constitutes a “commercial vehicle” under the new law?
Any vehicle registered for the transport of goods or passengers for compensation, including trucks over 10,000 pounds, delivery vans, buses, and rideshare vehicles used for paid trips.
If I receive a citation, can I contest it in court?
You may contest by showing the detector’s compliance with the passenger‑only designation and proper mounting. Successful defenses often rely on manufacturer documentation and photographs of the installation.