The Autódromo Internacional Nelson Piquet (Nelson Piquet International RaceTrack), also known as Jacarepaguá after the neighbourhood in which it was located, and also as the Autódromo Riocentro, was a motorsport circuit in Rio de Janeiro, Brazil. Opened in January 1978, a few weeks before 1978 Brazilian Grand Prix, it hosted the Formula One Brazilian Grand Prix on ten occasions, and was also used for CART, motorcycle racing and stock car racing. In 2012, it was demolished to make way for facilities to be used at the 2016 Summer Olympics. The original circuit The original circuit was built between 1971 and 1977 on the site of the Barra da Tijuca road course, which had itself been built on reclaimed marshland and was operational from 1964 to 1970. It was a relatively flat circuit, with a long pit straight and a longer back straight (which allowed the turbo-engined Formula One cars of the mid-1980s to reach speeds of , and numerous mid-speed to slow-speed corners with plenty of room for overtaking. The maximum spectator capacity was 90,000. With the exception of the 1978 race, the Formula One Grand Prixs were held in March or April in Rio's very hot and humid tropical early autumn weather. Formula One The first Brazilian Grand Prix at the circuit took place shortly after opening, in 1978, and was won by Argentina's Carlos Reutemann in a V12 Ferrari 312T3 in the oppressive heat and humidity of Rio's January summer season, after Sweden's Ronnie Peterson had taken pole position in the revolutionary ground-effect Lotus 78-Ford. After the 1979 and 1980 races had been held at the Interlagos circuit in São Paulo, the F1 circus left the Interlagos circuit due to safety concerns with the circuit and the growing slums of the circuit's surrounding areas being at odds with Formula One's new glamour image. Rio's beaches and beautiful scenery were more suited to this new image, and the Brazilian Grand Prix was then held at Jacarepaguá for the remainder of the 1980s. The 1981 race was held in very wet conditions and was again won by Reutemann, this time driving a Williams FW07C-Ford, and in controversial circumstances: he disobeyed the team's orders to let teammate and then-reigning World Champion, Australia's Alan Jones, take the win. The 1982 race, held at the height of the FISA–FOCA war, was also shrouded in controversy. Rio born driver Nelson Piquet, who had won