Vehicle and motorcycle noise on Ventura streets is primarily a state-law matter: California Vehicle Code §27150 requires every motor vehicle to have an adequate muffler in constant operation, §27151 prohibits modified exhaust systems that amplify noise (95 dBA SAE test ceiling for vehicles under 6,000 lbs), and CVC §23130 sets passing-vehicle dBA standards. Local enforcement is by Ventura PD and CHP on adjoining state routes (US-101, SR-126, SR-33, SR-1). SBMC Ch. 10.650 applies to stationary vehicle noise (idling, sound systems, repair work) on private property.
Two regimes overlap. (1) Moving vehicles — California Vehicle Code: §27150 (a) requires every motor vehicle subject to registration to have an adequate muffler in constant operation and prohibits cutouts/bypasses; §27151 (a) prohibits exhaust modifications that amplify or increase noise above limits, and codifies a 95 dBA SAE test ceiling for vehicles under 6,000 lbs (excluding motorcycles); §23130 sets passing-noise dBA limits by vehicle class and speed; §27001 prohibits unnecessary horn use; §22651.5 authorizes towing for excessive audible-device noise. These rules are enforced statewide by any peace officer, including Ventura PD officers and CHP on US-101 and SR-126 through the city. (2) Stationary/private-property vehicle noise — SBMC Ch. 10.650 applies to vehicle audio systems, idling diesel trucks at loading docks, mobile generators on construction sites, and engine repair on residential parcels, treated like any other stationary noise source and judged at the receiving property line.
CVC §27150/§27151 violations are correctable infractions (fix-it tickets) — a single dismissable on certification of repair, but repeat offenses move to non-correctable. Aftermarket exhaust shops may be cited for installing illegal systems. SBMC Ch. 10.650 stationary vehicle violations follow the standard infraction/misdemeanor path under Title 1. Boombox cars near the Promenade are commonly cited under §27007 (sound emanating more than 50 feet from a vehicle on a highway).
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Ventura, CA
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