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