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  2. Vehicle inspection in the United States - Wikipedia

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

    Vehicle emissions inspection station in Wisconsin. Arizona – biennially, in Phoenix and Tucson metro areas only, depending on age and type of vehicle. [28]California – biennially for all vehicles from out-of-state, regardless of age; and all vehicles made after 1975 which are more than six years old in all or some zip codes in 41 out of 58 counties.

  3. United States vehicle emission standards - Wikipedia

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

    Two sets, or tiers, of emission standards for light-duty vehicles in the United States were defined as a result of the Clean Air Act Amendments of 1990. The Tier I standard was adopted in 1991 and was phased in from 1994 to 1997. Tier II standards were phased in from 2004 to 2009. Within the Tier II ranking, there is a subranking ranging from ...

  4. Tennessee Highway Patrol - Wikipedia

    en.wikipedia.org/wiki/Tennessee_Highway_Patrol

    Website. official page. The Tennessee Highway Patrol (THP) is the State Patrol organization for the U.S. state of Tennessee, responsible for enforcing all federal and state laws relating to traffic on the state's federal and state highways. The agency was created to protect the lives, property, and constitutional rights of people in Tennessee.

  5. Emissions testing eliminated in Rutherford County, replaced ...

    www.aol.com/news/emissions-testing-eliminated...

    2022: Emission tests in Rutherford County are eliminated, but vehicles that would have required emission tests will pay increased registration fee

  6. Vehicle emissions control - Wikipedia

    en.wikipedia.org/wiki/Vehicle_emissions_control

    Vehicle emissions control is the study of reducing the emissions produced by motor vehicles, especially internal combustion engines. The primary emissions studied include hydrocarbons, volatile organic compounds, carbon monoxide, carbon dioxide, nitrogen oxides, particulate matter, and sulfur oxides. Starting in the 1950s and 1960s, various ...

  7. Vehicle inspection - Wikipedia

    en.wikipedia.org/wiki/Vehicle_inspection

    An inspection sticker from the Commonwealth of Massachusetts. A Warrant of Fitness certificate issued to vehicles in New Zealand. Vehicle inspection is a procedure mandated by national or subnational governments in many countries, in which a vehicle is inspected to ensure that it conforms to regulations governing safety, emissions, or both.

  8. FTP-75 - Wikipedia

    en.wikipedia.org/wiki/FTP-75

    t. e. The EPA Federal Test Procedure, commonly known as FTP-75 for the city driving cycle, are a series of tests defined by the US Environmental Protection Agency (EPA) to measure tailpipe emissions and fuel economy of passenger cars (excluding light trucks and heavy-duty vehicles). The testing was mandated by the Energy Tax Act of 1978 [1] in ...

  9. Transportation Research Center - Wikipedia

    en.wikipedia.org/wiki/Transportation_Research_Center

    Exhaust emissions are measured using a 2013 model year AVL iGem i60 CVS dilute emissions bench. The bench is capable of measuring tailpipe exhaust emissions produced by gasoline and diesel engines. The AWD dynamometer Test Cell temperature can be set for vehicle testing between 20F (-6C) and 100F (38C). [6]