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On this page you will find links to information about highway vehicles (cars and light trucks, heavy trucks, buses, engines, and motorcycles) 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.
Cars and Light Trucks: Provides information about controlling emissions from passenger cars and light trucks. This includes consumer information, vehicle standards and regulations, certification and compliance, fuel economy, and test data.
- Certification and Fuel Economy
- Verify Information
- Compliance Fees
- Compliance Guidance Letters
- Fuel Economy
- Light-Duty Automotive Technology and Fuel Economy Trends: 1975 Through Present
- Green Vehicle Guide
- Importing Vehicles and Engines
- On-Board Diagnostics
- Regulations
Heavy Trucks, Buses and Engines: Has general information about heavy-duty highway engines and their emisions.
Motorcycles: Provides information on controlling emissions from highway motorcycles. Recreational Vehicles has information about off-highway motorcycles, ATVs and utility vehicles.
Publications and Related Links: Other links related to On-road Vehicles and Engines include:
- Fuels
- Vehicle and Engine Emission Modeling Software
- Test Procedures and Laboratory Methods
- 2007 Progress Report: Vehicle and Engine Compliance Activities (PDF) (64 pp, 890K, EPA420-R-08-011, October 2008, About PDF)