Kammala wannan jumla: Ƙungiyar motar mota ta fara ne a matsayin wani ɓangare na Kwamitin Gasar AAA. AAA ta yanke shawarar dakatar da amincewa da dukkan ajin tsere bayan mutuwar Bill Vukovich a
1955 Indianapolis 500 ya biyo baya da bala'in Le Mans na 1955. USAC ta karɓi takunkumi a duk azuzuwan su da suka fara a 1956.