The National Highway Traffic Safety Administration (NHTSA) and the Environmental Protection Agency (EPA) jointly issued a Notice of Data Availability (NODA) to inform the public that additional data exists in the docket for the “Heavy-Duty Phase 2” rulemaking (Greenhouse Gas Emissions and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles - Phase 2).

NHTSA and EPA are requesting comment. There will be a 30-day public comment period after the NODA’s publication in the Federal Register. 

They are jointly proposing a national program that would establish the next phase of greenhouse gas (GHG) emissions and fuel efficiency standards for medium- and heavy-duty vehicles. This “Phase 2 program” would significantly reduce carbon emissions and improve the fuel efficiency of heavy-duty vehicles, helping to address the challenges of global climate change and energy security.

More information is available at:

Greenhouse Gas Emissions and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles - Phase 2; Notice of Data Availability (PDF)