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  2. 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 ...

  3. California Smog Check Program - Wikipedia

    en.wikipedia.org/wiki/California_Smog_Check_Program

    The program will eliminate tailpipe testing of post-1999 vehicles and instead use the vehicle's own emissions monitoring systems. This system has saved consumers in 22 states time and money. [ 19 ] Vehicles manufactured in the model years between 1976 and 1999 are now required to pass a more stringent dynamometer-based tail-pipe test than was ...

  4. United States vehicle emission standards - Wikipedia

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

    Only state which still conduct emission testing dating back to the 1967 model year unlike other states using EPA classification (a few still conduct test for 1968–present (1968+ testing is for jurisdictions using defined EPA standards for vehicle classification since the '68 model year and beyond automobiles must have an exhaust emission ...

  5. 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.

  6. Vehicle emissions control - Wikipedia

    en.wikipedia.org/wiki/Vehicle_emissions_control

    Emission test results from individual vehicles are in many cases compiled to evaluate the emissions performance of various classes of vehicles, the efficacy of the testing program and of various other emission-related regulations (such as changes to fuel formulations) and to model the effects of auto emissions on public health and the environment.

  7. 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.

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  9. Emission standard - Wikipedia

    en.wikipedia.org/wiki/Emission_standard

    Arizona emissions testing locations are located primarily in the two largest metropolitan areas (Phoenix and Tucson). People outside of these areas are not required to submit their vehicle for testing as these areas are the only ones that have failed the air quality tests by the state.