Colorado to Adopt Advanced Clean Trucks Rule - Heavy Duty Trucking
Colorado is set to adopt the Advanced Clean Trucks (ACT) rule, requiring manufacturers to sell an increasing percentage of zero-emission trucks. This will affect fleet operators in Colorado, who may need to plan for ZEV purchases and infrastructure.
Aforeworn detected this change in the Trucking / FMCSA Compliance space on July 8, 2026 and published this briefing so affected operators are forewarned rather than caught off guard. It is rated Medium urgency. Trucking companies operating in Colorado, especially those with fleets of Class 2b-8 vehicles should confirm how it applies to their specific situation before acting. There is a time constraint attached: Rule expected to be finalized in 2024; compliance begins with model year 2027 vehicles.. Acting after that point can mean penalties, a lapsed licence, or lost eligibility — exactly the kind of surprise Aforeworn exists to prevent. Aforeworn monitors Trucking / FMCSA Compliance continuously and turns every detected change into a plain-English briefing like this one, so you always know first. Forewarned is forearmed.
What changed
Colorado will require manufacturers to sell zero-emission trucks as a percentage of sales, starting model year 2027. Fleets may face limited availability of new diesel trucks and need to integrate ZEVs.
Who it affects
Trucking companies operating in Colorado, especially those with fleets of Class 2b-8 vehicles
What you must do
Monitor Colorado Air Quality Control Commission rulemaking and assess fleet transition plans for ZEVs.
Deadline
Rule expected to be finalized in 2024; compliance begins with model year 2027 vehicles.
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