Colorado transportation laws

What Colorado has enacted on transportation, what each law requires, and what the bills still moving would do. Colorado is one of 41 states that enacted a transportation law in the 2025 and 2026 sessions.

Bills in scope
7bills in scope
Past committee
6past committee
Most recent action
29 May 2026most recent action

Transportation laws enacted in Colorado

4 transportation laws enacted in the Colorado Legislature in the 2025 and 2026 sessions, newest first. Each links to the legislature's own page.

  • SB 21Clean Fleet Enterprise Replace Aging Diesel TrucksEnacted 20 April 2026

    What it does: Defines terms for the clean fleet enterprise program, including heavy-duty diesel trucks based in Colorado with at least 75 percent in-state annual miles, heavy-duty motor vehicles over 26,000 pounds, hydrogen fuel cell vehicles, inflation calculations, and medium-duty vehicles between 10,000 and 26,000 pounds.

    Truck and fleet emissions

  • SB 25-162Railroad Safety RequirementsEnacted 4 June 2025

    What it requires: Class I railroads, railroads operating lines used by Class I railroads as of July 1, 2024, and passenger rail systems must pay an annual fee beginning July 1, 2027, totaling no more than two million nine hundred thousand dollars yearly to cover the office of rail safety's costs. Railroads must notify the state watch center within thirty minutes of discovering train emergencies.

    Freight rail

  • SB 25-320Commercial Motor Vehicle TransportationEnacted 3 June 2025

    What it does: Reinstates sales and use tax exemption for certain low-emitting heavy-duty motor vehicles, power sources, and conversion parts from August 1, 2025 through December 31, 2028. Increases bridge and tunnel impact fees on special fuel to $0.07 per gallon for fiscal years 2025-26 and 2026-27, and $0.08 per gallon for fiscal year 2027-28.

    Motor carriers and commercial drivers

  • HB 25-1110Railroad Crossing Maintenance CostsEnacted 10 April 2025

    What it requires: The Commission shall adopt rules requiring railroads, railroad corporations, rail fixed guideways, transit agencies, or track owners to share equally with non-local road authorities the total costs to maintain existing crossings including materials, labor, traffic control, railroad flagging, and permits. If the road authority is a local government, the railroad entity pays for maintenance between railroad tie ends; the local government pays for maintenance outside the tie ends.

    Freight rail

Transportation in Colorado, by topic

Transportation bills in Colorado

The bills not yet law, furthest along first, with what each would do.

4Enacted

2Cleared both chambers

1Introduced or inactive

7 bills in scope

Cleared both chambers

2

HB 1286Automated Driving System Commercial VehiclesVetoed

What it would do: Requires a person holding an appropriate commercial driver's license to be physically present in the cab and prepared to intervene when an automated driving system operates a commercial motor vehicle with a gross vehicle weight rating of 26,001 pounds or more on a highway. Violators face Class A traffic infractions with penalties ranging from $1,150 to doubling penalties for subsequent convictions.

HB 25-1122Automated Driving System Commercial Motor VehicleVetoed

What it would do: Prohibits using an automated driving system to drive a commercial motor vehicle unless a commercial driver's license holder is physically present, monitors performance, and intervenes if necessary. Penalties are $1,000 for first offense, $2,000 for second, and double for each subsequent offense.

Introduced or inactive

1

HB 1248Oversize Overweight PermittingIntroduced

What it would do: Creates a Freight Cash Fund to receive permit fees and surcharges for oversize and overweight vehicles starting July 1, 2026, and requires the Office of Freight Mobility and Safety to implement a centralized online permitting system by July 1, 2029.

Bill titles link to the Colorado Legislature's own page.

What LawSignals covers

What counts as transportation legislation

In scope: Motor carriers and commercial drivers; truck size, weight and road use; truck and fleet emissions; hazardous materials transport; freight rail; ports, maritime and freight corridors; warehouses and delivery; and autonomous trucks and delivery devices.

Questions

Does Colorado have a transportation law?

Yes. Colorado enacted 4 transportation laws in the 2025 and 2026 sessions, among them SB 21, SB 25-162 and SB 25-320. Each is listed on this page with what it requires.

Which transportation bills are moving in Colorado?

2 bills not yet law have passed a committee or a chamber, the furthest along HB 1286 (vetoed) and HB 25-1122 (vetoed).

What does Colorado legislate on most in transportation?

Motor carriers and commercial drivers (3 bills), Freight rail (2 bills) and Autonomous trucks and delivery devices (2 bills).

Are these summaries reviewed by a lawyer?

No. Which bills count as Transportation bills, and the line on what each law requires or each bill would do, are drafted by software from the bill's own text and not reviewed by an attorney. Every bill links to the legislature's own record: read the text before relying on it. The list covers bills from the 2025 and 2026 sessions.

Other practice areas in Colorado

Transportation legislation in other jurisdictions

52 more currently hold bills in this tracker

Know when Colorado's transportation law changes

An alert when a bill moves, and one report a month on what changed in every state and Congress.

Track transportation laws freeAbout the Transportation and Logistics Tracker