The U.S. Environmental Protection Agency (EPA) has proposed a rule that would establish more strict emissions standards from heavy-duty vehicles and engines starting in model year 2027.
The rule would reduce air pollution from highway heavy-duty vehicles and engines, including ozone, particulate matter and greenhouse gases. It would specifically cut down the emissions of smog- and soot-forming nitrogen oxides (NOx) from heavy-duty gasoline and diesel engines and set updated greenhouse gas standards for certain commercial vehicle categories, and slash NOx emissions from trucks by as much as 60 percent in 2045.
According to the EPA, heavy-duty vehicles and engines are major contributors to concentrations of ozone and particulate matter and their resulting threat to public health. In addition to reducing emissions of nitrogen oxides and other pollutants, this proposal would make targeted updates to the existing Heavy-Duty Greenhouse Gas Emissions Phase 2 program, proposin
