Blue - steady = Another competitor is close
Blue - waved = Another competitor is trying to pass
White = Service vehicle or very slow car on circuit
Yellow - steady = Danger ahead, no overtaking, slow down
Yellow - waved = Great danger ahead, no overtaking, slow down, be prepared to stop
Red & Yellow vertical striped = Slippery surface ahead
Green = Proceed, hazard indicated has cleared
Red = Stop racing, proceed slowly to pits or start as instructed by marshals
Black with orange circle = Displayed with white number: warning of mechanical failure which might not be obvious to driver, call into pit immediately.
Black & White triangled = Displayed with white number: warning to driver that his behaviour (i.e. corner cutting) is suspect and he may be black flagged.
Black = Displayed with white number: Driver must call into pit immediately and report to the Clerk of the Course.
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