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About EPA's Office of Transportation and Air Quality
We're sorry, the requested page cannot be found on the Office of Transportation and Air Quality (OTAQ) web site, www.epa.gov/otaq/. The links below provide options for where to go next to try to find what you were looking for.
For additional assistance, please Contact Us via email or try our list of Contact Information by Topic.
- Transportation, Air Quality, and Climate Change: Information on how much air pollution 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 and how to buy the cleanest, most fuel-efficient vehicle that meets your needs.
- On-road Vehicles and Engines: Information about highway vehicles (cars and light trucks, heavy trucks, buses, and 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 vehiclesto the United States.
- Nonroad engines, Equipment, and Vehicles: Information about aircraft, locomotives, diesel and gasoline boats and ships, personal water craft, lawn and garden equipment, agricultural and construction equipment, and recreational vehicles (e.g., dirt bikes, snowmobiles): emission standards and regulations, certification and compliance, and diesel retrofit programs.
- Fuels and Fuel Additives: Information on diesel, gasoline, and alternative fuels for mobile sources, fuel quality control programs, the 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, including commuter choice programs, diesel retrofit, choosing a cleaner car or truck, and other initiatives.
- Transportation and Air Quality Planning: Information on the ties between land use and transportation planning, and air quality. Topics includes conformity, State Implementation Plans (SIPs), transportation control measures, and available funding and grants for implementation of such programs.
- Modeling, Testing, and Research: Information on OTAQ models for estimating emissions from on-road vehicles, nonroad sources, and fuels; information on how EPA tests and measures emissions; and information on OTAQ research into advanced technologies.
Other links on this page on the left and at the bottom of the page may be helpful.