Middlesex County does not set vehicle-noise rules. Motor-vehicle noise in New Jersey is governed statewide by Title 39, N.J.S.A. 39:3-70, which requires every vehicle to have a muffler in good working order and bans muffler cut-outs and noise-amplifying exhaust modifications.
There is no county vehicle-noise ordinance in Middlesex County; loud exhausts, cut-outs, and modified mufflers are handled under the statewide motor-vehicle code, N.J.S.A. 39:3-70 (Mufflers). The statute requires every motor vehicle with a combustion engine to be equipped at all times with a muffler in good working order and in constant operation to prevent excessive or unusual noise, and it prohibits muffler cut-outs, bypasses, and similar devices on a highway. It also bars installing or modifying a muffler in a way that amplifies or increases noise above the originally installed muffler. These rules are enforced by any New Jersey police officer, including Middlesex County municipal departments and the county Prosecutor's/Sheriff's traffic units, on public roads. Because Title 39 is statewide,
A N.J.S.A. 39:3-70 muffler violation is a motor-vehicle offense carrying a fine (commonly around $50 to $250 plus court costs) and is issued by a police officer at the roadside as a traffic summons. Repeat or aggravated modifications can lead
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