Editing Continuously variable transmission (section)

=== Racing cars ===
In the United States, [[Formula 500]] [[Open-wheel car|open-wheel]] [[Auto racing|racing cars]] have used CVTs since the early 1970s. CVTs were [[Formula One regulations|prohibited from Formula One]] in 1994 (along with several other electronic systems and driving aids) due to concerns over escalating [[research and development]] costs and maintaining a specific level of driver involvement with the vehicles.<ref>{{cite web|author=Keith Collantine|url=http://www.f1fanatic.co.uk/2007/05/03/banned-continuously-variable-transmission-cvt/|title=Banned! Continuously Variable Transmission|website=F1fanatic.co.uk|date=3 May 2007|access-date=17 June 2011}}</ref>