Stop, the session is suspended. Drivers must significantly reduce their speed and return to the pit lane. During double yellow flag period, overtaking is prohibited, unless it is clear that a car is slowing with a completely obvious problem.Īll clear, you can continue with race, any incident which was causing a single or double waved yellow flag has now been resolved. In order for the stewards to be satisfied that any such driver has complied with these requirements it must be clear that he has not attempted to set a meaningful lap time, for practical purposes this means the driver should abandon the fast lap. Any driver passing through a double waved yellow marshalling sector must reduce speed significantly and be prepared to change direction or stop because 'there is a hazard wholly or partly blocking the track and/or marshals working on or beside the track'. During yellow flag period, overtaking is prohibited, unless it is clear that a car is slowing with a completely obvious problem.ĭanger on the track ahead of the given signal. It must be clear that a driver has reduced speed and, in order for this to be clear, a driver would be expected to have braked earlier and/or reduced speed in the relevant marshalling sector. Drivers should reduce their speed and be prepared to change direction as 'there is a hazard beside or partly on the track'. A single waved yellow flag,as described in the FIA Sporting Code, warns drivers to slow down. About starting procedure in Formula 1 check here.ĭanger on the track ahead of the given signal. On the end of the race it is shown first to the winner and then to every car that crosses the line after him. Also indicate end of practice and qualifying session. Signal to GPS marshalling system lights is send to car from race control. System is invented and introduced because at such high speed or because of the conditions on the track, driver sometimes can't see marshal's flag.

This system is known as GPS marshalling system. Special display on steering wheel, with differently colored lights in color of the flag lights up when driver pass the affected sector of the track. But F1 will not be F1 if there is not something highly technological involved. All marshals at different points around the circuit are issued some of this standard flags to communicate this messages to drivers. Different colored flags are in use from early days of motoracing to communicate with drivers about different conditions on the track, penalty situations and start and end of the race.

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