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Illinois Secretary of State
The Illinois Secretary of State is the state's driver licensing and vehicle registration authority, also the state librarian, with Alexi Giannoulias as its 38th officeholder since 2023.
IM L6 (智己L6)
The IM L6 (智己L6), sold abroad as the MG IM5, is an electric liftback sedan by IM Motors, launched in 2024 and known for its semi-solid-state battery.
IM LS8
The IM LS8 (智己LS8) is an extended-range electric SUV from IM Motors, SAIC's premium EV brand, launched in China in April 2026 with 8,000 orders in its first hour.
IM LS9
The IM LS9 (智己LS9) is a full-size six-seat extended-range electric SUV produced by IM Motors, the SAIC-led premium EV joint venture, launched in China in November 2025 with prices from 322,800 yuan.
Immobiliser
An immobiliser, also called an engine immobiliser, is an electronic security device that stops a car's engine starting unless the correct key is present, helping cut car theft.
Imperial (automobile)
Imperial was Chrysler Corporation's top-line luxury automobile, first a Chrysler model from 1926, then a separate make from 1955 to 1975 meant to compete with Cadillac and Lincoln.
Independent suspension
Independent suspension is a vehicle suspension arrangement in which each wheel on the same axle moves vertically independently, giving better ride quality and handling than a rigid axle.
Index shifting
Index shifting is a bicycle gear-changing method in which each shifter click pulls a set amount of cable, moving the derailleur one sprocket, established by Shimano's 1984 SIS.
Indian Motorcycle
Indian Motorcycle is an American motorcycle brand founded in 1901 in Springfield, Massachusetts by George M. Hendee and Oscar Hedstrom, billed as America's First Motorcycle Company.
Indian Roads Congress
The Indian Roads Congress (IRC), founded in New Delhi in 1934, is India's national body for road and bridge engineering and publisher of the IRC highway design standards.
Indian Scout (motorcycle)
The Indian Scout is a cruiser motorcycle made by Indian, produced from 1920 to 1949 in Springfield, Massachusetts, and revived in 2015 by the Polaris-owned company.
Indian Trails
Indian Trails is a family-owned intercity bus company in Owosso, Michigan, founded in 1910 and one of the oldest bus companies in the United States.
Indiana Department of Transportation
The Indiana Department of Transportation (INDOT) is Indiana's state agency for interstate highways, U.S. routes, and state roads, descended from the Indiana State Highway Commission created in 1919.
Ineos Fusilier
The Ineos Fusilier is a four-wheel-drive electric SUV announced by Ineos Automotive in 2024, planned with battery-electric and range-extender powertrains but paused in July 2024.
Ineos Grenadier
The Ineos Grenadier is a four-wheel-drive off-road vehicle produced by INEOS Automotive since 2022, conceived by Jim Ratcliffe as a successor in spirit to the original Land Rover Defender.
Infantry fighting vehicle
An infantry fighting vehicle (IFV), also called an infantry combat vehicle, is an armored combat vehicle that carries an infantry squad and is armed with a cannon of at least 20 mm.
Infantry tank
The infantry tank was a class of heavily armored, deliberately slow tank defined by British interwar doctrine, meant to advance with walking infantry; examples include the Matilda, Valentine, and Churchill.
Infiniti
Infiniti, also known as Nissan Infiniti, is Nissan's luxury vehicle division, launched in the United States in 1989 with the Q45 sedan and M30 coupe.
Infiniti M
The Infiniti M was a line of luxury sedans sold by Infiniti from 1989 until 2019, renamed the Infiniti Q70 for the 2014 model year.
Infiniti Q45
The Infiniti Q45 was a full-size rear-wheel-drive luxury sedan built by Nissan from 1989 to 2006 as the flagship of its Infiniti brand, powered by a V8.
Infiniti Q50
The Infiniti Q50 is a sports sedan produced by Nissan's Infiniti division from 2013 to 2024 as the successor to the G37, sold in Japan as the Nissan Skyline.
Infiniti Q60
The Infiniti Q60 is a two-door luxury sport coupe sold in the United States from 2014 to 2022, replacing the Infiniti G37 Coupe and discontinued after 2022.
Infiniti QX60
The Infiniti QX60, originally sold as the JX35, is a midsize three-row luxury crossover SUV from Infiniti that debuted in 2013 and is built in Smyrna, Tennessee.
Infiniti QX65
The Infiniti QX65 is a two-row, five-passenger midsize luxury crossover SUV with a fastback roofline, built by Infiniti and sold as a 2027 model year vehicle.
Infiniti QX70
The Infiniti QX70, also known as the Infiniti FX or FX35, is a mid-size luxury crossover SUV with a coupe-like roofline, sold by Infiniti from 2014 until 2017.
Infiniti QX80
The Infiniti QX80, badged QX56 from its 2004 launch until 2014, is a three-row, body-on-frame luxury SUV built by Infiniti on a chassis shared with the Nissan Patrol.
INFORM (Long Island)
INFORM (INformation FOR Motorists), formerly the Integrated Motorist Information System, is a corridor traffic management system run by the New York State DOT on Long Island since 1987.
Infrastructure investment trust
An infrastructure investment trust (InvIT) is a SEBI-regulated Indian investment vehicle that owns income-generating infrastructure assets like toll roads and distributes most cash to unitholders.
Inlet manifold
An inlet manifold, also called an intake manifold, distributes air or air-fuel mixture from a shared plenum through runners to each cylinder of an internal combustion engine.
Inner Belt (Boston)
The Inner Belt was a planned 7.3-mile expressway, Interstate 695, looping through Boston, Cambridge, and Somerville, canceled in 1971 and 1972 amid the American highway revolts.