When is it safe to resume racing after entering a yellow flag zone?

Resuming racing is safe only when you have passed the hazard indicated by the yellow flags and can see a waved green flag displayed. Yellow flags signal to drivers that there is a hazard on the track, and they must slow down, prepare to change direction, or be cautious. Once you have physically passed the hazard that prompted the yellow flag and have confirmation through a waved green flag, you know it is appropriate to accelerate back to racing speeds. This process ensures that all drivers are fully aware of the track conditions and that they can race safely without the threat of encountering ongoing hazards.

The other options do not provide the necessary criteria for safely resuming full racing speed. For example, simply waiting for the Safety Car to leave the track does not guarantee that it is safe to resume racing if the hazard remains. Similarly, a full lap under yellow does not confirm that the track ahead is clear of hazards, and lifting yellow flags without a visible green flag might lead to rushing back into racing without adequate assurance of a safe environment. Therefore, passing the hazard and seeing a waved green flag is the most definitive signal of safety for resuming racing.