EPA moves to weaken truck emissions rules, lift engine slowdowns
What's new: The agency estimated savings of up to about $6,152 per diesel engine, while its analysis projected higher nitrogen oxide pollution.
The Environmental Protection Agency moved to scale back parts of Biden-era pollution rules for heavy-duty trucks, buses and other diesel vehicles, opening the changes for public comment. The proposal would postpone and weaken requirements tied to emissions-system warranties and the useful life of pollution controls. It would also scrap a rule that cuts engine power when emissions equipment fails, replacing it with driver alerts. EPA estimated the changes would save the trucking industry $4,130 to $6,152 per affected diesel engine. Its analysis found the rollback would raise ozone-forming nitrogen oxide emissions from heavy-duty trucks by 4.2% in 2030 and 11.6% by 2055 compared with current rules.