Resources » Regulations » New Engines & Vehicles » Heavy-Duty Vehicles
- US EPA Heavy-Duty Highway Engines page
- EPA information on truck and bus emissions. Includes heavy-duty engine emission regulations, fact sheets, Urban Bus Retrofit/Rebuild notices.
- US EPA Cleaner Trucks, Buses, and Diesel Fuel page
- EPA information on the 2007 diesel emission and diesel fuel regulation.
- US EPA HD Highway Engines Consent Decree page
- Information on the Consent Decree, reached in 1998 between the EPA and US HD engine manufacturers on the issue of off-cycle NOx emissions.
- “Asleep at the Wheel”
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Committee on Commerce, US House of Representatives, March 2000
A report outlining the history of events leading to the EPA - engine manufacturers Consent Decree and charging the EPA with failure to enforce emission standards for heavy-duty diesel trucks. - US EPA Nonroad CI Engine Emissions page
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US EPA
Information on nonroad diesel engine emission regulations. - Reducing Nonroad Diesel Emissions
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US EPA
Information on Tier 4 emission legislation from nonroad diesel engines. - California Urban Transit Bus Regulations
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California Air Resources Board
Information and regulatory documents on California emission regulations for urban buses.