The US Environmental Protection Agency has announced final national greenhouse gas pollution standards for heavy-duty vehicles, such as freight trucks and buses, for model years 2027 through 2032 to cut pollution on the transport sector. The “Greenhouse Gas Emissions Standards for Heavy-Duty Vehicles - Phase 3” build on EPA’s Heavy-Duty Phase 2 program from 2016 and maintain that program’s flexible structure, being technology-neutral and performance-based, allowing each manufacturer to choose what set of emissions control technologies is best suited for them and the needs of their customers. The EPA’s rule provides time for the development of vehicle technologies and deployment of charging and refuelling infrastructure. The new standards apply to heavy-duty vocational vehicles and tractors, and should help avoid 1 Gt of GHG emissions.
Heavy-duty vehicles account for 25% of all GHG emissions from the transportation sector, which is itself the single largest source of GHG emissions in the United States. The final heavy-duty GHG standards complete EPA’s Clean Trucks Plan for reducing GHG emissions and other harmful air pollutants (including nitrogen oxides (NOx), particulate matter (PM), and air toxics) from heavy-duty vehicles through a series of rulemakings.
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