Motor-vehicle noise is governed statewide by the PA Vehicle Code, which requires every vehicle to have a working muffler with no cutout or bypass. Lancaster City adds local limits tied to PennDOT sound rules and caps standing-vehicle idling at 15 minutes per hour.
Pennsylvania's Vehicle Code (75 Pa.C.S. §4523) sets the statewide muffler and exhaust standard for every motor vehicle on a highway, and PennDOT's Title 67 regulations set vehicular sound-level limits. Lancaster County does not add its own rule, but municipalities can. Lancaster City's Chapter 198 requires vehicle noise to comply with PennDOT Title 67, Chapter 157, limits standing-vehicle idling to 15 minutes in any hour, restricts horn use, and prohibits engine brake retarders. Loud exhaust and modified mufflers are primarily a state police and local police enforcement matter.
Muffler violations are summary offenses under the state Vehicle Code. Lancaster City noise penalties start at $150 for a first offense.
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See how Lancaster's vehicle noise rules stack up against other locations.
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