what is the average speed of a nascar car
Monster Energy NASCAR Cup Series Race speeds vary widely depending on the track. The fastest track is Talladega Superspeedway, where the record average speed is 188.354 mph (303.126 km/h) and the record qualifying lap is 212.809 mph (342.483 km/h), set by Bill Elliott in 1987. The record stands unlikely to be broken, as restrictor plates were made mandatory at superspeedways in 1988 to reduce speeds.[47] The slowest tracks are Sonoma Raceway, a road course with a record average speed of only 83.6 mph (134.5 km/h) and a record qualifying lap of 99.3 mph (159.8 km/h), and Martinsville Speedway, a short, nearly flat "paper clip" oval, with a record average speed of 82.2 mph (132.3 km/h) and a record qualifying lap of 99.9 mph (160.8 km/h). The average speed of a race is determined by dividing the winner's race time (from the waving of the green flag to the waving of the checkered flag, including laps spent under caution) by the distance of the race. Time elapsed during red flag periods is not included in the calculation of the average speed.