Regulations for Onroad Vehicles and Engines
This page provides links to regulations for controlling greenhouse gas (GHG) emissions, smog, soot and other air pollution from onroad vehicles.
Final Rule Improvements Heavy Duty Engine and Vehicle Test
Passenger Vehicles
(Light-Duty)
- Regulations for GHG emissions from passenger cars & trucks
- Regulations for smog, soot, and other air pollution from passenger cars & trucks
Commercial Trucks & Buses
(Heavy-Duty)
- Regulations for GHG emissions from commercial trucks & buses
- Regulations for smog, soot, and other air pollution from commercial trucks & buses