The green flag signals race start, the end of caution periods, or all-clear conditions indicating normal racing may resume. This fundamental racing signal communicates to drivers that full competition speed is permitted and overtaking can proceed without restriction.
Green flag situations:
- Race start: Waved to initiate racing from standing or rolling start formations
- Restart after yellow flag: Indicates hazard cleared and racing may resume
- Sector all-clear: Shows specific track sections are safe for normal racing
- Practice/qualifying sessions: Signals track is open and timing is active
At standing starts, the green flag typically coincides with start lights extinguishing, whilst rolling starts see the flag waved as the front row crosses the start line. During races, green flags at marshal posts indicate those specific track sectors are clear of incidents or hazards. Drivers must remain alert for green flag locations after passing yellow flag zones, as racing may resume immediately upon seeing the green. Some circuits use electronic flag displays supplementing physical flags, ensuring drivers receive clear signals even at high speeds or in poor visibility conditions. Understanding flag signals forms a fundamental part of the mandatory ARKS training before drivers receive their first competition licence.