Andretti, currently a spokesman for the sanctioning body, is stepping down to enter into a more defined business relationship with CART Champ Car.
Most recently Andretti served as liaison for CART Champ Car and Road America, helping reinstate the long-time Champ Car race in Elkhart Lake, Wisconsin, which resulted in the renaming of the event as the 'Mario Andretti Grand Prix at Road America Presented by Briggs & Stratton'.
Said Andretti: "I've very much enjoyed serving on CART's board of directors and I'll continue to be a very active and vocal supporter of CART and Champ Car racing."
Patrick, CART's first president, will also not stand for re-election.
Patrick will continue to pursue his many business interests in addition to his role as owner of Patrick Racing.
Patrick and Andretti will formally step down from the board at next month's annual meeting of stockholders at the company's Indianapolis headquarters.
Robert D. Biggs, formerly managing partner of the PriceWaterhouseCoopers office in Ilinois, will stand for election to the board during the stockholder meeting.
