No, in actuality, radar detectors are legal in Illinois. Though that’s not the full context, actually, see, in terms of commercial vehicles, yes, radar detectors are illegal. And you may be asking this question because it somehow feels illegal to use radar detectors, but in actuality, there are laws regarding this in every state, and sure enough, every state is different in that regard.
What Is a Radar Detector?
A radar detector is a gadget that can identify the radar signals that are emitted by the police to find out the speed of a vehicle. Upon detecting a signal, it warns the driver. The main thing is that a radar detector is only capable of receiving signals. It does not transmit anything and hence, does not cause any interference with police equipment.
Since it is a passive device and does not block or jam signals, the law considers radar detectors differently from banned devices.
Radar Detectors vs Radar Jammers
Many people often mix up radar detectors and radar jammers, but these two are different. Jammers actively block, or create interference, with the devices that law enforcement uses to measure speed. And that’s considered interference with the police.
In Illinois, and throughout the U.S., the use of jammers is against the law. The rules for radar detectors, on the other hand, are quite different. To cut the story short: detectors only listen while jammers interfere. And this difference is very significant when it comes to the law.
What Federal Law Says
Radar detectors have been regulated by the federal government in such a way that private passenger vehicles are allowed to use them. Federal law allows for devices that receive radio signals, which is essentially what radar detectors do.
Still, the federal law distinctly prohibits the usage of radar detectors in commercial vehicles throughout the United States. The law applies to all states such as Illinois and is supported by the Department of Transportation regulations.
Hence, one can say that although it is legal to use a radar detector in a personal vehicle, it is illegal for a commercial vehicle.
The Clear Rule in Illinois
Radar detectors are not prohibited in Illinois for personal vehicles. Thus, you are free to use a radar detector in a personal car, SUV, motorcycle, or non-commercial pickup truck.
Moreover, Illinois conforms to federal regulations for commercial vehicles. Therefore if the vehicle is a commercial one, radar detectors are prohibited.
Hence in Illinois, the question of legality is based on the kind of vehicle you are driving.
1. Personal Vehicles: Legal
When a driver uses a personal, non-commercial vehicle, radar detectors are allowed in Illinois. The state does not have any law against owning or using a radar detector in a private vehicle.
Therefore a police officer is not allowed to stop you just because you have a radar detector in your car.
2. Commercial Vehicles: Not Allowed
If you use a commercial vehicle, radar detectors are illegal by federal law. Most likely, it would be such vehicles as heavy trucks, company vehicles, and vehicles that require a CDL.
In such scenarios, the police officers have the authority to fine you and even confiscate your radar detector.
Illinois Has a Strict Policy on Jammers
The state considers jammers to be a serious violation of the law. Only for personal use are radar detectors permissible in Illinois. A state ban includes both radar and laser jammers.
The fact that it is regarded as police interference means that the authorities can impose very heavy penalties on anyone caught using a jammer without regard to the way the product is marketed.
