Summary
While there is no universal system of racing flags across all of motorsports, most series have standardized them, with some flags carrying over between series. For example, the chequered flag is commonly used across all of motorsport to signify the end of a session (practice, qualifying, or race), while the penalty flags differ from series to series. FIA-sanctioned championship flags are the most commonly used internationally (outside of North America) as they cover championships such as Formula 1, the FIA World Endurance Championship and WTCC, and are adopted (and sometimes adapted) by many more motorsport governing bodies across the world such as, for example, the MSA.
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Uses of flags in major racing leagues Flag FIA-sanctioned championships NASCAR IndyCar Start, end of hazard, or restart Start/restart Local caution or full-course caution (if displayed with "SC" sign) Caution Local caution (single) or full-course caution (twin) Debris/oil/slippery course Not used Pit lane closed Session stopped prematurely Slow vehicle on track Final lap Final lap/slow vehicle on track Not used except for pickup truck and SCSA oval races: Final lap Not used Ambulance on course Return to pits (i.e., disqualification) Penalty of some form Car has a dangerous mechanical problem and must go to its pit Not used Unsportsmanlike conduct Not used Not used No longer scored Faster car approaching - during races, lapped cars should give way to faster cars when safe to do so Local caution/slow vehicle on track Faster car approaching Not used Faster car approaching Not used Finish
Read more about this topic: Racing Flags
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