Clean Trucks Plan

The U.S. Environmental Protection Agency (EPA) issued the Control of Air Pollution from New Motor Vehicles: Heavy-Duty Engine and Vehicle Standards Proposed Rule in March 2022, which proposes new nitrogen oxides (NOx) and greenhouse gas (GHG) emissions standards for heavy-duty engines and vehicles for Model Year (MY) 2027 and later. EPA proposed two regulatory options for new NOx standards and requested comment on both. In addition, EPA proposed stricter GHG standards for the Heavy-Duty GHG Emissions Phase 2 program, which would affect certain subcategories of vocational and tractor vehicles, such as school buses, transit buses, commercial delivery trucks, and short-haul tractors. Stricter GHG standards would begin with MY 2027 vehicles.

This action is the result of Executive Order 14037, issued in August 2021, which directed EPA to consider setting new NOx emission standards and updating the existing GHG emissions standards for heavy-duty engines and vehicles. EPA must issue a final rule by December 2022. For more information, refer to EPA’s Regulations for Emissions from Vehicles and Engines website.