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Law varies from state to state, but detectors are generally legal in private vehicles under the Communications Act of 1934[20] and illegal in commercial vehicles by DOT regulation (49 CFR 392.71).

Exceptions:
Illegal in all vehicles: Virginia, Washington D.C., U.S. military bases
Illegal in commercial vehicles under state law: Illinois, New York, New Jersey (specifically, commercial vehicles over 10,000 pounds (4,500 kg) and all vehicles over 18,000 pounds (8,200 kg)) Also illegal in all commercial vehicles over 10000 lbs under US federal law

15 years ago. Rating: 0
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