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Blue Flag
Flags
A Blue Flag is a signal shown to drivers indicating that a faster car is approaching from behind and they should allow it to pass safely.
In most racing series, blue flags are mandatory signals that require slower cars to yield to faster ones, especially when being lapped. Marshals typically wave blue flags when the approaching car is within a certain distance, giving the slower driver time to move off the racing line without losing excessive time.
Ignoring blue flags can result in penalties. For example, in Formula 1, drivers who ignore three consecutive blue flags may receive a drive-through penalty. This system helps maintain fair racing while allowing leaders to navigate through traffic efficiently.