Noise cameras capture license plates to ticket loud vehicles in US cities
Cities across the United States are deploying roadside noise cameras that use microphones, cameras, and software to pinpoint loud vehicles and capture their license plates for warnings or citations.
Cities across the United States are increasingly deploying roadside noise cameras that use microphones, cameras, and software to pinpoint loud vehicles and capture license plate information. At least 10 U.S. jurisdictions have deployed or piloted noise-camera technology in recent years, with communities exploring programs ranging from data collection to automated citations.
New York City operates one of the most established enforcement programs. The city’s Department of Environmental Protection operated 12 cameras in 2025, recording 15,994 noise events and generating 1,691 summonses for excessive engine, muffler, horn, or vehicle-music violations. Muffler violations carry minimum penalties of $800, up to a maximum of $2,625. The equipment is supplied by Intelligent Instruments Ltd., a U.K. company whose SoundVue system combines microphones, video, and license plate recognition.
Other communities have taken different approaches. Knoxville, Tennessee, used the technology in a mobile program to record vehicle data and support warnings, but does not currently issue camera-generated citations. Miami Beach tested three Intelligent Instruments systems during a pilot, but state law prevented automated citations. The city later launched a Quiet Zone pilot in July 2026 where police officers handle enforcement under existing laws.
Avoca, Iowa, implemented a noise-camera program along Highway 59 using technology from Intelligent Instruments and backend services from Sitestream after testing it to address truck engine-compression braking complaints. Hawaii launched a two-year noise-camera pilot on Oʻahu in September 2025 across 10 locations to collect data on noise levels exceeding 90 decibels to guide future legislation, without issuing camera-generated tickets. Kirkland, Washington, tested a street racing noise pilot program at two locations to determine if the system could reliably separate a noisy vehicle from surrounding traffic without issuing tickets or warnings.
Additional deployments and tests include Newport, Rhode Island, and Albuquerque, New Mexico, utilizing equipment from Dutch acoustic company Sorama. Newport’s program issues $250 citations for excessive vehicle noise. Santa Fe, New Mexico, signed a five-year contract worth up to $4 million with Jenoptik Smart Mobility Solutions for automated speed and noise enforcement using six mobile enforcement devices. University Park, Maryland, activated a noise-enforcement camera on January 7, 2026, as part of a state and county effort. West Haven, Connecticut, planned to install four noise-detection devices along its shoreline under a state law setting violation thresholds at 80 decibels with progressive penalties, while Boston and Providence have explored or planned potential acoustic-camera pilots.
Industry evaluations have highlighted technical challenges regarding accuracy. The California Highway Patrol evaluated sound-activated enforcement systems from TNL, Intelligent Instruments, and Jenoptik, and concluded that the evaluated systems were not adequate as standalone enforcement tools due to difficulties in reliably tying noise to the correct vehicle amid varying lighting, plate visibility, and traffic conditions.
Systems typically attempt to resolve vehicle identification using multiple microphones to calculate sound origin and combine acoustic data with video and license plate images. While proponents emphasize human review before issuing citations and positioning options that keep vehicle interiors out of view, the expansion of acoustic roadside technology continues to draw attention regarding data retention, privacy, and accuracy.