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ColoradoHB25-10392025 Regular SessionHouseWALLET

Commercial Vehicle Muffler Requirements

Sponsored By: Brianna Titone (Democratic), Dylan Roberts (Democratic), Lesley Smith (Democratic), Marc Catlin (Republican)

Signed by Governor

Transportation & Motor Vehicles

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Bill Overview

Analyzed Economic Effects

3 provisions identified: 0 benefits, 2 costs, 1 mixed.

State contractors face muffler contract requirements

Beginning July 1, 2027, Colorado state agencies must include a muffler-compliance term in every construction contract. The term requires contractors' and subcontractors' commercial vehicles entering public project sites to follow the state's muffler rules.

Broader muffler rules for commercial vehicles

Beginning July 1, 2027, Colorado requires mufflers on commercial vehicles with internal combustion engines driven on highways, not just those with engine compression brakes. Farm vehicles are exempt. Mufflers must be placed so officers can visually check that they are present, intact, and working. A hidden muffler requires paperwork kept in the vehicle and available to a peace officer. The paperwork must show installation met federal manufacturing noise standards for the vehicle's model year. It must also list the vehicle identification number, muffler purchase date, make and model, and business that sold and installed it.

Higher commercial vehicle fines with relief

For offenses beginning July 1, 2027, commercial vehicle muffler violations are class B traffic infractions with a $1,000 fine, up from $500. Courts must waive the fine when required records prove a muffler was in place before the citation. Courts must cut the fine by 50%, to $500, with proof of proper muffler installation within 30 days after citation. Half of fine revenue goes to the city or town where the violation occurred, or the county for unincorporated areas. The other half goes to the state's Highway Users Tax Fund.

Sponsors & Cosponsors

Sponsors

  • Brianna Titone

    Democratic • House

  • Dylan Roberts

    Democratic • Senate

  • Lesley Smith

    Democratic • House

  • Marc Catlin

    Republican • Senate

Cosponsors

  • Alex Valdez

    Democratic • House

  • Julie McCluskie

    Democratic • House

  • Karen McCormick

    Democratic • House

  • Meghan Lukens

    Democratic • House

Roll Call Votes

All Roll Calls

Yes: 101 • No: 34

Senate vote • 5/1/2025

Third reading: Bill

Yes: 30 • No: 5

Senate vote • 4/30/2025

Refer House Bill 25-1039 to the Committee of the Whole and with a recommendation that it be placed on the consent calendar.

Yes: 7 • No: 0

Senate vote • 4/28/2025

Refer House Bill 25-1039 to the Committee on Appropriations.

Yes: 8 • No: 0

House vote • 4/21/2025

Third reading: Bill

Yes: 41 • No: 22

House vote • 4/15/2025

Refer House Bill 25-1039 to the Committee of the Whole.

Yes: 8 • No: 3

House vote • 1/28/2025

Refer House Bill 25-1039, as amended, to the Committee on Appropriations.

Yes: 7 • No: 4

Actions Timeline

  1. Governor Signed

    5/15/2025House

  2. Signed by the Speaker of the House

    5/13/2025House

  3. Signed by the President of the Senate

    5/13/2025Senate

  4. Sent to the Governor

    5/13/2025House

  5. Senate Third Reading Passed - No Amendments

    5/1/2025Senate

  6. Senate Committee on Appropriations Refer Unamended - Consent Calendar to Senate Committee of the Whole

    4/30/2025Senate

  7. Senate Second Reading Special Order - Passed - No Amendments

    4/30/2025Senate

  8. Senate Committee on Transportation & Energy Refer Unamended to Appropriations

    4/28/2025Senate

  9. Introduced In Senate - Assigned to Transportation & Energy

    4/22/2025Senate

  10. House Third Reading Passed - No Amendments

    4/21/2025House

  11. House Second Reading Special Order - Passed with Amendments - Committee, Floor

    4/17/2025House

  12. House Committee on Appropriations Refer Unamended to House Committee of the Whole

    4/15/2025House

  13. House Committee on Transportation, Housing & Local Government Refer Amended to Appropriations

    1/28/2025House

  14. Introduced In House - Assigned to Transportation, Housing & Local Government

    1/8/2025House

Bill Text

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