Session suspended or stopped due to imminent danger to competitors or spectators, or due to bad weather. Also used when a miscellanious vehicle, such as the medical car or an ambulance, is on track. Slow moving vehicle ahead - often waved on the last corner during free practice when drivers do practice starts. In practice and qualifying, this is shown when a car is being hindered by a slower car. If the driver ignores 3 consecutive blue flags, a penalty is issued to the driver. A green flag is also shown at the start of the first session of the day.Ī blue flag indicates that the driver in front who is one or more laps down must let faster cars behind pass. This is always shown following a yellow flag to indicate that the hazard has been passed. Can be seen 'rocked' from side-to-side (not waved) to indicate a small animal on track.

Slippery track, due to oil, water or loose debris. This board is always accompanied by a single waving yellow flag. VSC (Virtual Safety Car) is for more minor incidents, where no safety car is on track, but drivers must slow down to a required Delta. Drivers stay behind the SC until the marshals have cleared up. Safety Car is put out on track when an incident blocks the track or leaves a lot of debris. A specific speed reduction is added in order to increase drivers’ lap time to around 35% less than a normal dry lap time.

Double waved yellow flag means overtaking prohibited due to danger on the track.Single waved yellow flag means overtaking prohibited due to danger off the track.The meaning can vary depending on the way it is waved and how many are waved. While technological advances has meant that, in Formula One, many flags have been replaced by signal lights, the system of coloured flags has remained constant since the early years of racing. All forms of motorsport use a system of flags or signal lights to inform drivers of hazards during a session.

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