Friday 16th September 1955

The USAC was formed by Indianapolis Motor Speedway owner Tony Hulman after the American Automobile Association (AAA) withdrew from auto racing following the 1955 Le Mans disaster. It became the arbiter of rules, car design, and other matters for what it termed championship auto racing. The USAC’s long history as on open-wheel sanctioning body continues today with the Silver Crown Series, National Sprint Car Series, National Midget Series, Ignite Ethanol Fuel Series, .25 Midget Series, and Traxxas TORC Series.