Port St. Lucie's Sec. 94.06(b)(4) bans a vehicle sound system 'plainly audible at a distance of 25 feet,' and Sec. 94.06(a) bars honking over 30 seconds except as a warning. Roadway vehicle/muffler noise is otherwise governed by Florida law (F.S. § 316.293), which the county noise chapter defers to.
In Port St. Lucie, Sec. 94.06(b)(4) makes it unlawful to play a radio, tape player or similar device in a motor vehicle 'in a manner as to be plainly audible at a distance of 25 feet,' and Sec. 94.06(a) prohibits sounding a horn continuously for more than 30 seconds except as a danger warning. The unincorporated county, in Sec. 28-111(5), exempts vehicle noise 'as specified in F.S. §§ 316.293 and 403.415,' meaning on-highway motor-vehicle and muffler noise is regulated by state statute rather than the county's dB table. Excessively loud mufflers and modified exhaust are addressed under Florida's motor-vehicle noise and equipment laws enforced by the Sheriff and Florida Highway Patrol.
Port St. Lucie car-audio and horn violations are cited under the Sec. 94.09 fine schedule ($50 / $250 / misdemeanor). Roadway muffler and exhaust violations are enforced as state traffic infractions under F.S. § 316.293 and Chapter 316.
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See how St. Lucie County's vehicle noise rules stack up against other locations.
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