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  • Vehicle inspection in the United States

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    Vehicle inspection laws by state: Striped: Both safety and emissions testing required In the United States, vehicle safety inspection and emissions inspection are governed by each state individually. 17 states have a periodic (annual or biennial) safety inspection program, while Maryland and Alabama require a safety inspection on sale or transfer of vehicles which were previously registered in another state. In 1977, the federal Clean Air Act was amended by Congress to require states to implement vehicle emissions inspection programs, known as I/M programs (for Inspection and Maintenance), in all major metropolitan areas whose air quality failed to meet certain federal standards. New York's program started in 1982, California's program ("Smog Check") started in 1984, and Illinois' program started in 1986. The Clean Air Act of 1990 required some states to enact vehicle emissions inspection programs. State impacted were those in metropolitan areas where air quality did not meet federal standards. Some states, including Kentucky and Minnesota, have discontinued their testing programs in recent years with approval from the federal government.

  • Vehicle inspection

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    An inspection sticker from the Commonwealth of Massachusetts A Warrant of Fitness certificate issued to vehicles in New ZealandVehicle 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. Inspection can be required at various times, e.g., periodically or on the transfer of title to a vehicle. If required periodically, it is often termed periodic motor vehicle inspection; typical intervals are every two years and every year. When a vehicle passes inspection, often a sticker (inspection decal or inspection sticker) is placed on the vehicle's windshield or registration plate to simplify later controls, but in some countries—such as the Netherlands since 1994—it's no longer necessary. Inspection stations are places to drive inside to see if a vehicle passes inspection once a vehicle is due for inspection. Most US inspection decals/stickers display the month's number and the year. In some jurisdictions, proof of inspection is required before a vehicle license or license plate can be issued or renewed.

  • Motorcycle testing and measurement

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    A Triumph Sprint ST on a chassis dynamometer Suzuki Hayabusa at Bonneville Speed Week.Motorcycle testing and measurement includes a range of more than two dozen statistics giving the specifications of the motorcycle, and the actual performance, expressed by such things as the output of the engine, and the top speed or acceleration of the motorcycle. Most parameters are uncontroversial and claims made by manufacturers are generally accepted without verification. These might include simple measurements like rake, trail, or wheelbase, or basic features, such as the type of brakes or ignition system. Other measurements are often doubted or subject to misunderstandings, and the motorcycling press serves as an independent check on sometimes unrealistic sales and marketing claims. Many of these numbers are subject to variable methods of measurements, or disagreement as to the definition of the statistic. The parameters most often in contention for motorcycles are the weight, the engine output (power and torque), and the overall performance, especially acceleration, top speed, and fuel economy. With electric motorcycles and scooters, the range between charges is often a pivotal measurement.

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