Since the 2015 season, the calendar consists of 1/3 of oval races, 1/3 of races on permanent natural road courses, and 1/3 of races on temporary street courses in larger cities.
Sejak musim 2015, kalender terdiri dari 1/3 balapan oval, 1/3 balapan di kursus jalan alam permanen (road course), dan 1/3 balapan di kursus jalan sementara di kota-kota besar (street circuit).