Bellflower's Municipal Code Chapter 9.28 (Sound and Advertising Vehicles) restricts sound/loudspeaker vehicles to 9:00 a.m.-4:30 p.m. and bans them on Sundays and within 300 feet of hospitals, schools and religious facilities. Engine/exhaust noise on streets is governed by the California Vehicle Code.
Bellflower regulates two distinct categories of vehicle noise. First, Chapter 9.28 of the Municipal Code (Title 9, Public Peace and Welfare) covers 'sound vehicles' and 'advertising vehicles' - vehicles equipped with loudspeakers or sound-amplifying devices used to advertise or attract public attention. Under this chapter a person shall not operate a sound vehicle with its sound-making device or loudspeaker in operation on any public highway or in the air between the hours of 4:30 p.m. and 9:00 a.m. of the following day, nor on any Sunday, nor within 300 feet of any hospital, school or religious facility; and a sound vehicle may not make any loud and raucous noise at any time or place. The chapter's definition of a sound vehicle expressly includes aircraft equipped with such devices. Second, ordinary engine, exhaust and modified-muffler noise from cars and motorcycles on public roads is controlled by California state law (California Vehicle Code provisions on adequate mufflers and prohibited noise), not by a separate Bellflower decibel ordinance.
Operating a sound/advertising vehicle outside the 9 a.m.-4:30 p.m. window, on a Sunday, or near a hospital/school/religious facility violates Chapter 9.28. Excessive exhaust or muffler noise from regular vehicles is enforced under the California Vehicle Code by police. Chapter 9.28 does not state a specific fine amount.
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