 Kọ itẹsiwaju fun paragirafi yii - Lẹyin igba meji ti Formula One United States Grand Prix ti wọn ro pe ko ṣaṣeyọri Sebring ni 1959, ati Riverside ni 1960 : , àwọn olùdásílẹ ń wá ibi tuntun láti fi ṣe ilé fún United States Grand Prix. 