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On-road Vehicles and Engines

On this page you will find links to information about highway vehicles including 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 to the United States.

Trucks, Buses & Engines

blue truck head on the road

Motorcycles

the rear view of two motocycles ride on the road

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This page is maintained by EPA's Office of Transportation and Air Quality (OTAQ).
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