|No championship was awarded from 1909-1915 and 1917-1919. The series went on hiatus from 1942-1945 due to World War II.|
The 1946 season was the first season back after World War II, the AAA Contest Board, in fear of having low car counts, decided to count the 71 events of the 1946 AAA Big Car Series as part of the season. Thus making the event count 77 races for the season. The car counts did not suffer as expected, so in December of 1946 the Contest Board decided to only count the initial 6 races scheduled. Official records only count these 6 races and therefore we will only count those races for the 1946 season.
NOTE: Initially the AAA policy for race results was the following: in the event cars are not running at the time the race is officially completed, the prize money will be paid to the cars and positions determined according to the relative position of that car at the time.
In other words, cars that were running on the track at the conclusion of the race were placed ahead of any cars that were not running. Thus, a driver could complete more laps, but due to being unable to finish the race, were then placed behind all other cars that were running. This policy was stopped in the late 1930's.
Following the closure of the AAA Contest Board after the 1955 season, the United States Auto Club was formed and took over the series. Thus starting the, statistically separate, USAC Champ Car Series.