Transportation and Air Quality

Quick Finder
certification climate and greenhouse gas fuel economy grants Green Racing	green vehicles idling reduction importing Magic School Bus modeling	on-board diagnostics recalls renewable fuels SmartWay A-Z Index

Recent Additions December 4: Final rule for heavy-duty OBD systems November 14: EPA is announcing the Renewable Fuel Standard for 2009 EPA announces extended comment period on California's nonroad diesel in-use fleet requirement Other recent additions

EPA's Office of Transportation and Air Quality (OTAQ) protects public health and the environment by regulating air pollution from motor vehicles, engines, and the fuels used to operate them, and by encouraging travel choices that minimize emissions. These "mobile sources" include cars and light trucks, heavy trucks and buses, nonroad recreational vehicles (such as dirt bikes and snowmobiles), farm and construction machines, lawn and garden equipment, marine engines, aircraft, and locomotives.

A detailed list of topics and programs is on our site map.

Overview:  Pollutants and Programs:  Information on how much air pollution, air toxics, and greenhouse gases are emitted by mobile sources, the programs OTAQ has undertaken to control these emissions, and the impact of those programs on air quality and climate change.

Consumer Information:  Learn what you can do to help reduce air pollution. Use the Green Vehicle Guide to find the cleanest, most fuel-efficient vehicle that meets your needs.

On-Road Vehicles & Engines: Information about highway vehicles (cars and light trucks, heavy trucks, buses, engines, and motorcycles): fuel economy, emission standards and regulations, emission recall programs, new vehicle certification and in-use vehicle compliance, inspection and maintenance programs, diesel retrofit programs, evaluating the benefits of inventions designed to reduce emissions, and importing vehicles and engines to the United States.  

Nonroad Engines, Equipment, and Vehicles:  Information about aircraft, diesel boats and ships, gasoline boats and personal watercraft, nonroad diesel equipment, forklifts, generators and compressors (gasoline and propane), lawn and garden (small gasoline equipment), locomotives, and snowmobiles, dirt bikes, and ATVs: emission standards and regulations, certification and compliance, and diesel retrofit programs.

Fuels and Fuel Additives:  Information on diesel, gasoline, renewable fuels, and alternative fuels for mobile sources, fuel-quality control programs, requirements for registration and health effects testing of new fuels or fuel additives, and reporting forms.

Partnerships:  Information about our partnerships to reduce air pollution associated with transportation and other mobile sources. These programs include National Clean Diesel Campaign (NCDC) | SmartWay | Clean School Bus USA.

State and Local Transportation Resources:  Information on the ties between land use, transportation planning, and air quality. Find information on transportation and conformity, policy and guidance, laws and regulations, and calculators and modeling tools.

Modeling, Testing, and Research:  Information on modeling and inventories for estimating emissions from highway vehicles, nonroad sources, and fuels; testing and measuring emissions; research into clean automotive technologies; and emission factors research.

For more information, please contact us.