Atlantic Championship Series

The Atlantic Championship Series is an American open-wheel racing series with races throughout North America. It has previously been called Champ Car Atlantics, Toyota Atlantics (after it's then engine supplier for sponsorship reasons), or just Atlantics

The series began in 1974 as a professional version of the Sports Car Club of America's amateur Formula Atlantic classification and typically served as a stepping stone to the original Indy Lights series under Championship Auto Racing Teams (CART). After that series was ended in 2002, the Atlantic series became the official developmental series of CART successor Champ Car World Series until the merger of Champ Car with IndyCar in 2008. The series ran independently on 2009 under IMSA sanctioning but shut down following that season. Starting in 2012, the series was revived by Formula Race Promotions with SCCA Pro Racing sanctioning. FRP switched to USAC sanctioning in 2017, though in 2019 it returned to being sanctioned by SCCA Pro Racing.