 In the following years, the calendar stabilized, with the return of races in Phoenix, Pocono, and Gateway, despite the races at Fontana, Pocono, Phoenix and Milwaukee being removed from the schedule after a short guest appearance due to insufficient crowd or bad promotion.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.In 2019, an IndyCar race was held for the first time on a current Formula 1 racetrack, the "Indycar Classics" at the Circuit of the Americas in Austin, Texas.