Vehicle noise is set by Pennsylvania statute, not Delaware County. 75 Pa.C.S. § 4523 requires every vehicle on a highway to stay within the sound level the state prescribes; loud exhaust and muffler defects are enforced statewide.
Because motor-vehicle noise is a Vehicle Code matter, the same rule applies everywhere in Delco. 75 Pa.C.S. Section 4523(a) requires every motor vehicle operated on a highway to be constructed, equipped, maintained, and operated so as not to exceed the state's prescribed sound level. PennDOT's regulation, 67 Pa. Code Section 157.11, sets the numeric limits (for example, 76-84 dBA for ordinary cars depending on speed and site). Middletown's local horn rule (Section 155-2.C) additionally bars unnecessary, harsh horn use. Municipal police and the Pennsylvania State Police enforce both the statute and any local horn or vehicle-noise provisions.
Violations of § 4523 and PennDOT sound-level rules are summary traffic offenses (fine plus costs and possible equipment-repair order). Local horn misuse can add a municipal fine.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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See how Delaware County's vehicle noise rules stack up against other locations.
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