Adams County has no unincorporated-area vehicle-noise ordinance. Vehicle noise is governed by Colorado's statewide muffler law (CRS 42-4-225), which requires a working muffler and prohibits amplified exhaust or cutout devices.
State traffic law, enforced by the Sheriff and State Patrol, requires every motor vehicle to have a muffler in good working order that prevents excessive or unusual noise, and bans muffler cutouts, bypasses, or similar devices that amplify exhaust. Loud aftermarket exhaust and 'jake brake' engine braking are addressed through this statute rather than a county noise resolution. General ambient vehicle noise from a stationary source could also implicate the CRS 25-12-103 decibel limits, but moving-vehicle noise is primarily a traffic-code matter.
Muffler and excessive-noise violations are traffic infractions under CRS 42-4-225, ticketed by law enforcement.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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