The trucking industry and congressional Republicans are fighting new EPA regulations aimed at reducing smog-forming emissions from heavy-duty trucks — a mandate that is likely to significantly increase costs for big rigs and for shipping in general.
And an upcoming regulation aimed at mitigating greenhouse gases from the same vehicles could complicate matters further because the technologies for reducing smog and carbon emissions might not be compatible.
The EPA’s nitrogen oxide (NOx) rule, finalized in December and taking effect in March, requires heavy- and medium-duty vehicles starting in model year 2027 to meet the “most stringent” emissions reduction option first proposed by the agency a year ago.
