EPA Targets Heavy-Truck Emission Rules for Likely Rollback

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The U.S. Environmental Protection Agency is reopening its Greenhouse Gas Emissions Standards for Heavy-Duty Vehicles rules as well as its Heavy-Duty Nitrous Oxide rule as part of a sweeping review of what an agency release described as the Biden administration’s “problematic” Clean Trucks Plan.

Along with actions targeting heavy vehicles, EPA stated it will also reconsider the Model Year 2027 and Later Light-Duty and Medium-Duty Vehicles regulation, which was approved about one year ago.

EPA in a wide-ranging March 12 release said the GHG and light- and medium-duty rules were “imposing over $700 billion in regulatory and compliance costs, and maintained that the rules formed the basis of “the Biden-Harris electric vehicle mandate that takes away Americans’ ability to choose a safe and affordable car for their family and increases the cost of living on all products that trucks deliver.”

These were among 31 actions the agency is launching in an effort that EPA Administrator Lee Zeldin described as “the greatest and most consequential day of deregulation in U.S. history” as well as “the most momentous day in the history of the EPA.”

We commend President @realDonaldTrump and @epaleezeldin for restoring common sense to our nation’s environmental laws and demonstrating bold leadership on this critical issue that affects not only the 8.5 million men and women who work in trucking, but all Americans.… — American Trucking (@TRUCKINGdotORG) March 12, 2025

Specific to the NOx rule, EPA said that rule — which dates to August 2021 — would result in “significant costs that will make the products our trucks deliver, like food and other household goods, more expensive.”

American Trucking Associations President Chris Spear in a statement thanked Trump and Zeldin “for restoring common sense to our