This week, Colorado lawmakers passed legislation intended to reduce “noise pollution” from commercial vehicles.
On May 13, the Colorado General Assembly passed House Bill 25-1039 and sent it to the desk of Governor Jared Polis to be signed into law.
Currently, Colorado state law only requires a muffler on commercial vehicles equipped with an engine compression brake (Jake Brake). The bill strengthens this requirement by mandating that all commercial vehicles be equipped with a muffler that is either visibly inspectable or accompanied by documentation verifying its presence and compliance.
The bill also increased the fine for non-compliant truckers from $500 to $1000. If a trucker can prove that a muffler was installed within 30 days after the citation was issued, the fine is to be reduced by 50%.
The bill is set to go into effect on July 1, 2027.
City of Golden Applauds Passage of HB25-1039 to Reduce Commercial Vehicle Noise – https://t.co/plWzK0o9Zf
— GoldenPD (@GoldenCOPS) May 16, 2025
“Golden’s unique location at the intersection of major highways has made us particularly vulnerable to noise from commercial vehicles lacking proper mufflers,” said Laura Weinberg, Mayor of Golden. “We are grateful to former City Councilor Casey Brown, who alongside citizens and our partners, advocated heavily for the bill, and the state legislature for enacting this law, which will significantly enhance the quality of life for our residents.”
According to Colorado Community Media, Colorado Motor Carriers Association President Greg Fulton says that a small number of truckers remove their muffler because they prefer the look and loud noise that their truck produces without one.
