Final Rule: Greenhouse Gas Emissions Standards for Heavy-Duty Vehicles – Phase 3
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Rule Summary
Para información en español, haga clic aquí.
On March 29, 2024, the U.S. Environmental Protection Agency (EPA) announced a final rule, “Greenhouse Gas Emissions Standards for Heavy-Duty Vehicles – Phase 3,” that sets stronger standards to reduce greenhouse gas emissions from heavy-duty (HD) vehicles beginning in model year (MY) 2027. The new standards will be applicable to HD vocational vehicles (such as delivery trucks, refuse haulers, public utility trucks, transit, shuttle, school buses, etc.) and tractors (such as day cabs and sleeper cabs on tractor-trailer trucks).
The final “Phase 3” standards build on EPA’s Heavy-Duty Phase 2 program from 2016 and maintain that program’s flexible structure, which is designed to reflect the diverse nature of the heavy-duty vehicle industry. The standards are technology-neutral and performance-based, allowing each manufacturer to choose what set of emissions control technologies is best suited for them and the needs of their customers.
- Final Rule: Greenhouse Gas Emissions Standards for Heavy-Duty Vehicles -Phase 3 (pdf) (20.1 MB, published April 22, 2024)
- Final Rule Correction: Greenhouse Gas Emissions Standards for Heavy-Duty Vehicles -Phase 3 (pdf) (435 KB, published June 17, 2024)
Rule History
Additional Resources
- Fact Sheet: Final Standards to Reduce Greenhouse Gas Emissions from Heavy-Duty Vehicles for Model Year 2027 and Beyond (pdf) (167 KB, March 2024, EPA-420-F-24-018)
- Fact sheet in Spanish: Normas finales para reducir las emisiones de gases de efecto invernadero de los vehículos pesados modelos del año 2027 y posteriores (pdf) (173 KB, March 2024, EPA-420-F-24-019)
- Regulatory Impact Analysis: Control of Air Pollution from New Motor Vehicles: Heavy-Duty Engine and Vehicle Standards Regulatory Impact Analysis (pdf) (12.6 MB, March 2024, EPA-420-R-24-006)
- Response to Comments: Greenhouse Gas Emissions Standards for Heavy-Duty Vehicles: Phase 3 (pdf)
- Redline Version of EPA’s Final Regulation for Greenhouse Gas Emissions Standards for Heavy-Duty Vehicles: Phase 3 (pdf)