Chicago regulates car alarms under the general noise provisions of Chapter 8-32. Testing of stationary emergency signaling devices is limited to minimum cycle test time, not exceeding 4 minutes, and only between 9 AM and 5 PM. Persistently sounding car alarms are treated as noise disturbances.
Chicago Municipal Code Chapter 8-32 addresses car alarms under the broader framework of noise and vibration control. While the code does not set a specific auto-shutoff time for vehicle theft alarms like some cities, it regulates them as potential noise disturbances. Testing of stationary emergency signaling devices is restricted to the minimum cycle test time, not exceeding 4 minutes, and must occur between 9:00 AM and 5:00 PM. Car alarms that sound continuously for extended periods violate the general noise provisions and may be treated as a public nuisance. Chicago Police Department responds to car alarm complaints. Under Illinois Vehicle Code, vehicle alarms are permitted only as anti-theft devices and must not constitute a noise nuisance. The city may authorize towing of vehicles with malfunctioning alarms that cannot be silenced and whose owners cannot be located. Residents can report chronic car alarm problems through 311.
Persistently sounding car alarms may result in noise violation citations. Vehicles with malfunctioning alarms may be towed if the owner cannot be located. Repeat violations may result in additional fines and towing fees at the owner's expense.
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