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  2. United States vehicle emission standards - Wikipedia

    en.wikipedia.org/wiki/United_States_vehicle...

    In the United States, the emission standards for non-road diesel engines are published in the US Code of Federal Regulations, Title 40, Part 89 (40 CFR Part 89). Tier 1–3 Standards were adopted in 1994 and was phased in between 1996 and 2000 for engines over 37 kW (50 hp). In 1998 the regulation included engines under 37 kW and introduced ...

  3. Vehicle inspection in the United States - Wikipedia

    en.wikipedia.org/wiki/Vehicle_inspection_in_the...

    Striped: Both safety and emissions testing required. In the United States, vehicle safety inspection and emissions inspection are governed by each state individually. Fifteen states have a periodic (annual or biennial) safety inspection program, while Maryland requires a safety inspection and Alabama requires a VIN inspection on sale or transfer of vehicles which were previously registered in ...

  4. Emission standard - Wikipedia

    en.wikipedia.org/wiki/Emission_standard

    The United States has its own set of emissions standards that all new vehicles must meet. In the United States, emissions standards are managed by the Environmental Protection Agency (EPA). It uses tiers to identify emission standards for cars, trucks and other motor vehicles. [8]

  5. Court upholds California's authority to set nation-leading ...

    www.aol.com/news/court-upholds-californias...

    In 2022, Ohio led a coalition of states in filing a petition to attempt to block California’s ability to enforce its own vehicle emissions standards, saying it violated the U.S. Constitution and ...

  6. Worldwide Harmonised Light Vehicles Test Procedure

    en.wikipedia.org/wiki/Worldwide_Harmonised_Light...

    The Worldwide Harmonised Light vehicles Test Procedure (WLTP) [1] is a global driving cycle standard for determining the levels of pollutants, CO 2 emission standards and fuel consumption of conventional internal combustion engine (ICE) and hybrid automobiles, as well as the all-electric range of plug-in electric vehicles.

  7. As electric vehicle sales slow, US relaxes plans for stricter ...

    www.aol.com/news/epa-expected-relax-auto...

    The Biden administration this week is expected to announce new automobile emissions standards that relax proposed tailpipe limits for three years but eventually reach the same strict standards set ...

  8. 17 states weigh adopting California's electric car mandate - AOL

    www.aol.com/news/17-states-weigh-adopting...

    Seventeen states with vehicle emission standards tied to rules established in California face weighty decisions on whether to follow that state's strictest-in-the nation new rules that require all ...

  9. Category:Emission standards - Wikipedia

    en.wikipedia.org/wiki/Category:Emission_standards

    Pages in category "Emission standards" The following 22 pages are in this category, out of 22 total. ... United States vehicle emission standards; V. Vehicle ...