Rubuta ci gaba ga wannan sakin layi - Lokacin da kungiyar motocin Amurka (AAA) ta janye daga tseren motoci bayan kakar 1955, tana ambaton bala'in Le Mans da mutuwar Bill Vukovich a Indianapolis
a matsayin masu ba da gudummawa, an ambaci SCCA da NASCAR a matsayin mai maye gurbinsa. A ƙarshe, mai mallakar Indianapolis Motor Speedway Tony Hulman ne ya kafa USAC. Ya zama mai yanke hukunci game da dokoki, ƙirar mota, da sauran batutuwa don abin da ya kira gasar tseren motoci, mafi girman matakin tseren USAC. Na ɗan lokaci akwai jerin keɓaɓɓun ƙayyadaddun bayanai don motocin zakarun da aka tsara don yin aiki a kan ƙazanta, maimakon a shimfiɗa, hanyoyi.