Vehicle noise in Martinez is regulated through California Vehicle Code sections enforced by Martinez Police, including prohibitions on modified exhaust systems, excessive engine revving, loud stereos audible from 50+ feet, and sustained horn use. Fines typically range from $200 to $500, with equipment violations requiring proof of correction through a certified referee inspection.
Martinez Police enforce vehicle noise primarily under California Vehicle Code §27150 (adequate muffler required) and §27151 (modification of exhaust to amplify or increase noise prohibited). Aftermarket exhaust systems must meet SAE J1492 or J1169 standards, typically 95 decibels at 50 feet for passenger vehicles. Loud car stereos audible from 50 feet or more violate CVC §27007 and trigger citations. Motorcycle noise is a recurring complaint along Alhambra Avenue, Pacheco Boulevard, and Highway 4 corridors, where CHP and Martinez PD conduct periodic enforcement. Excessive engine revving, tire squealing, and exhibition of speed are prohibited under CVC §23109 and Martinez Municipal Code. Semi-truck engine braking (jake brakes) is discouraged on city streets but not explicitly banned; signs are posted on key truck routes. Fines typically range from $200 for first offenses to $500+ for repeat violations. Equipment violations (loud exhaust) are correctable — drivers can reduce the fine by obtaining a referee station certification within 30 days. Commercial vehicle noise near the Martinez Marina, Amtrak station, and Shell Refinery access routes is regulated through operational permits.
Contact your local code enforcement office for specific penalty information.
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