Tuhia he tomokanga mō tēnei wāhanga - I te wā i mawehe atu ai te American Automobile Association (AAA) i ngā whakataetae motokā i muri i te tau 1955, e kī ana i te parekura o Le Mans me te matenga o Bill Vukovich i Indianapolis
I whakahuatia ko te SCCA me te NASCAR hei kaiwhaiwhai pea. I te mutunga, i hangaia te USAC e te rangatira o Indianapolis Motor Speedway a Tony Hulman. I riro i a ia te kaiwhakawa o nga ture, te hoahoa motuka, me etahi atu mea mo te mea i kiia ko te whakataetae whakataetae motuka toa, te taumata teitei o te whakataetae USAC. Mo te wa poto he raupapa motuhake o nga whakaritenga mo nga motuka toa i hangaia kia rere i runga i te paru, kaua ki te papa, ara.