Kammala wannan jumla: AAA ta daina shiga gasar tseren motoci a karshen kakar 1955. Ya ambaci jerin manyan hatsarori masu haɗari, wato Bill Vukovich a
Indianapolis, da kuma bala'in Le Mans. Gasar ta kasa ta karbe ta ne daga United Auto Club (USAC), sabuwar kungiyar da aka kafa ta mai mallakar Indianapolis Motor Speedway, Tony Hulman.