This bill establishes regulations regarding the use of automated vehicle noise enforcement systems by local authorities in Iowa. Specifically, it prohibits these authorities from issuing citations for violations detected by such systems if the noise in question is generated from a vehicle's brake or exhaust system while the vehicle is in the process of reducing speed.

Additionally, the bill stipulates that any citation issued in violation of this provision will be considered void and unenforceable. The term "automated vehicle noise enforcement system" is defined within the bill as a camera or optical device that works alongside a noise measuring device to detect and capture images or data of vehicles exceeding specified noise level restrictions.