United States Auto Club
Auto racing sanctioning body in the United States
The United States Auto Club (USAC) is one of the sanctioning bodies of auto racing in the United States. From 1956 to 1979, USAC sanctioned the United States National Championship, and from 1956 to 1997 the organization sanctioned the Indianapolis 500. USAC serves as the sanctioning body for a number of racing series, including the Silver Crown Series, National Sprint Cars, National Midgets, Speed2 Midget Series, .25 Midget Series, Stadium Super Trucks, and GT World Challenge America. Seven-time USAC champion Levi Jones is USAC's Competition Director.
History
When the American Automobile Association (AAA) withdrew from auto racing after the 1955 season, citing the Le Mans disaster and the death of Bill Vukovich at Indianapolis as contributing factors, both the SCCA and NASCAR were mentioned as its potential successor. Ultimately, USAC was formed by Indianapolis Motor Speedway owner Tony Hulman. It became the arbiter of rules, car design, and other matters for what it termed championship auto racing, the highest level of USAC racing. For a while there was a separate series of specifications for championship cars designed to be run on dirt, rather than paved, tracks. Today, USAC sanction open-wheel racing series such as the Silver Crown Series, National Sprint Car Series, National Midget Series, and Quarter Midgets.
Triple crown
The "triple crown" is earned in USAC racing when a driver claims all three national championships (Silver Crown, sprint car, and midget car).
This brief starts where responsible research should: with the source description of “United States Auto Club” as auto racing sanctioning body in the United States. Everything that follows is an evidence route, not borrowed authority.
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The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Sep 8, 2026. The linked authority identifier is Q1336046. VIAF identifies the subject as 159268849. The Library of Congress control number is n79049541. 3 of 4 selected statements include explicit references; 1 carry qualifiers and 0 use preferred rank. The first chronological checks are 1956, 1979, 1997 and 1955.
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This entry incorporates text from “United States Auto Club” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.