Direct Final Rule for Heavy-Duty Engine and Vehicle, and Nonroad Technical Amendments
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Rule Summary
EPA and National Highway Traffic Safety Administration (NHTSA), on behalf of the Department of Transportation, are each adopting corrections to provisions in our respective Medium- and Heavy-Duty Greenhouse Gas Emissions and Fuel Efficiency final rule issued on September 15, 2011. These amendments eliminate duplicative reporting requirements, reduce inadvertent minor differences between the EPA and NHTSA programs regarding such matters as voluntary early model year compliance, better align testing procedures to market realities, and reduce unnecessary testing burdens.
- Direct Final Rule: Heavy-Duty Engine and Vehicle, and Nonroad Technical Amendments (pdf) (529 KB, published June 17, 2013)
Additional Resources
- Fact Sheet: EPA Issues Amendments to the Heavy-Duty Highway Greenhouse Gas Rule and Other Nonroad Provisions (pdf) (531 KB, EPA-420-F-13-001, May 2013)