Laser jammers are not specifically illegal in New York for private passenger vehicles. No state statute names them, and the law people usually cite, Vehicle and Traffic Law § 397-a, only reaches radar and laser detectors in heavy and commercial vehicles. That doesn’t make using one safe. New York’s obstruction of governmental administration statute can apply to active interference with police equipment, and that’s a misdemeanor rather than a traffic ticket.
What VTL § 397-a Actually Covers
The statute titled “Radar detectors and laser detectors prohibited” is narrower than its name suggests. It bans radar and laser detectors only in motor vehicles with a gross vehicle weight rating above 18,000 pounds, and in commercial vehicles above 10,000 pounds.1New York State Senate. New York Vehicle and Traffic Law 397-A – Radar Detectors and Laser Detectors Prohibited A violation is a traffic infraction with a fine of $25 to $100, and the statute does not authorize seizure of the device unless some other law provides for it.
Two things are absent from the text. The statute never mentions jammers, jamming, or active interference with speed-measuring equipment. And it imposes no restriction at all on ordinary passenger cars. For a typical sedan or SUV, § 397-a has nothing to say about either a detector or a jammer.
New York also has not joined the roughly eleven states and Washington, D.C. that have passed statutes expressly banning laser jamming devices. There is no federal ban either; police LIDAR runs on infrared light, outside the FCC’s radio-frequency jurisdiction under 47 U.S.C. § 333.2Office of the Law Revision Counsel. 47 USC 333 – Willful or Malicious Interference
The Obstruction Charge That Fills the Gap
The absence of a device-specific ban is not the end of the analysis. New York Penal Law § 195.05 makes it a class A misdemeanor to intentionally obstruct, impair, or pervert the administration of law, or to prevent a public servant from performing an official function, through intimidation, physical force, interference, or any independently unlawful act.3New York State Senate. New York Penal Law 195.05 – Obstructing Governmental Administration in the Second Degree A class A misdemeanor can carry up to a year in jail.
Whether firing infrared pulses back at a police LIDAR gun qualifies as “interference” under § 195.05 has not been settled by a clear appellate ruling on laser jammers specifically. The prosecutor’s argument writes itself: the officer is performing an official function by measuring vehicle speeds, and the jammer is designed to stop that function from working. If that theory lands, you are looking at a criminal record rather than a $25-to-$100 fine, and the device can be seized as evidence of the offense.
Commercial Drivers Face a Separate Set of Rules
If you drive a commercial motor vehicle, the analysis changes. Federal law under 49 CFR § 392.71 prohibits any CMV driver from using a radar detector, and bars motor carriers from requiring or permitting a driver to violate that rule.4eCFR. 49 CFR 392.71 – Radar Detectors; Use and/or Possession The federal regulation names detectors, not jammers, but a CDL holder caught using any device designed to defeat speed enforcement has far more to lose than the fine itself. CDL discipline is its own category of consequence.
What Happens If an Officer Notices
Officers trained on LIDAR recognize what it looks like when a gun returns no reading or an error code in a situation where it should produce a speed. If the gun worked on every other car in the lane but came back empty on yours, that pattern alone can justify a stop.
The “jam to kill” approach popular in enthusiast forums, jamming long enough to slow down and then disabling the device so the officer gets a clean reading, has the same tell. An officer who sees an initial error followed by a sudden clean reading at a suspiciously low speed knows what happened. You may avoid the speeding ticket and still end up stopped, questioned, and inspected for the equipment on your dashboard. If the officer identifies a jammer and the prosecutor pursues § 195.05, the exposure jumps from a traffic infraction to a misdemeanor that shows up on background checks.3New York State Senate. New York Penal Law 195.05 – Obstructing Governmental Administration in the Second Degree
Radar Detectors Are a Different Question
Radar detectors are passive receivers. In a private passenger vehicle in New York they are legal, because VTL § 397-a reaches them only above the weight thresholds set out in the statute.1New York State Senate. New York Vehicle and Traffic Law 397-A – Radar Detectors and Laser Detectors Prohibited Mounting one in a spot that blocks your view through the windshield is a separate problem under VTL § 375(30), which prohibits objects that interfere with the operator’s view.
Laser jammers sit in a different legal space. They are active transmitters built to stop law enforcement equipment from functioning, and that active-interference character is what opens the door to an obstruction theory even where the detector statute does not reach.