Vehicles and Engines
- Cars and Light Trucks
- Heavy Trucks, Buses, and Engines
- Importing Vehicles and Engines
- Voluntary Diesel Retrofit Program
- Clean School Bus USA
- Clean Diesel Program
- Diesel Boats and Ships
- Diesel Equipment (Farm, Construction, etc...)
- Recreational Vehicles
- Test Procedures and Laboratory Methods
Cars and Light TrucksIn the past thirty years emissions from gasoline-powered automobiles have been reduced dramatically. Beginning in the 1970s, catalytic converters were added and unleaded gasoline became standard. The 1980s saw the introduction of computer controls, and the 1990s brought the advent of sophisticated On-Board Diagnostic (OBD) systems and evaporative emission controls. Throughout that time fuel economy has improved, and now automobiles are emitting, on average, 95% less harmful pollutants per mile than in 1970.
- EPA's Green Vehicle Guide - Find out how your vehicle rates for emissions and fuel economy.
- Fuel Economy - Where do those MPG numbers come from?
- Vehicle and Engine Emission Certification - learn about what tests a vehicle must pass to prove it meets emission standards.
Diesel Vehicles and EnginesEPA Region 4 supports a number of programs aimed at reducing emissions from heavy-duty diesel (HDD) engines. Heavy-duty diesel engines are significant sources of ozone-forming pollutants such as nitrogen oxides (NOx) and hydrocarbons (HC), as well as particulate matter (PM). Although diesel vehicles account for only a small percentage of the vehicles on the road, they make a large contribution to the overall amount of mobile source emissions. The Southeast Diesel Collaborative (SEDC) is a partnership of leaders from federal, state and local government, the private sector and other stakeholders in Alabama, Florida, Georgia, Kentucky, Mississippi, North Carolina, South Carolina and Tennessee. The goal of this partnership is to improve air quality and public health by reducing emissions from existing diesel engines.
- The Southeast Diesel Collaborative (SEDC)- The SEDC is a partnership of leaders from federal, state and local government, the private sector and other stakeholders in Alabama, Florida, Georgia, Kentucky, Mississippi, North Carolina, South Carolina and Tennessee. The goal of this partnership is to improve air quality and public health by reducing emissions from existing diesel engines.
- Heavy Duty Diesel Rules and Regulations - Proposed and final rules and fact sheets relating to diesel engines.
- Clean School Bus USA - Find out about Region 4 efforts to retrofit school buses and make them cleaner.
- Anti-Idling - Heavy trucks and certain locomotives spend a significant amount of time idling their engines, burning fuel and emitting harmful pollutants in the process.
- Truck Stop Electrification -
An alternative to idling trucks overnight at truck stops. Several cities in Region 4, including Atlanta and
Knoxville, have advanced truck stop electrification projects in place.
A concentric hose and integral cabling connects an HVAC system
to a computer-powered service delivery module, which fits
into the truck's cab window using an adapter. The module
delivers heat and air conditioning, internet, local telephone
service, satellite television, movies on demand and
computer-based interactive driver training to the cab of the
truck. The module also features electrical outlets inside and
outside the cab for appliances and engine and oil heaters.
- Cleaner Diesel
Fuel Cell VehiclesEPA is taking a leading role in the development of fuel cell technology for automotive applications. You can learn more at the Office of Transportation and Air Quality (OTAQ) fuel cell Web site.