Endurance racing (motorsport) these classes continued to embrace the endurance format. Multiple drivers per car was an early adaptation as the rigors of endurance racing quickly overcome the abilities of most racing drivers to compete solo, although solo attempts on 24 hour races like Le Mans would continue into the 1950s. The various endurance formats were appealing to manufacturers, not only as alternatives to the expense of Grand Prix racing, but also because of its increased relevance to road going models. In automobile endurance racing, three events have come to form a Triple Crown. They are considered three of the most challenging endurance
Kari Motor Speedway yearly basis since January 2017. Recently the track hosted first edition of FFS India 2017 in October 2017 with its second edition to be conducted in October 2018. Kari Motor Speedway Kari Motor Speedway is a purpose built Formula 3 auto racing circuit or race track, located in Chettipalayam, Coimbatore, India. The long track was inaugurated in 2003. The circuit is named after S. Karivardhan. Part of the existing track was used as a runway for power gliders, as a part of an ultralight aviation manufacturing company owned by S. Karivardhan. The stretch was also used in the late 1990s