Next weeks patch will introduce a long awaited new feature: Flag rules!
RaceRoom currently features 7 different flags: Green Flag
Indicates the start of a session and safe racing conditions. Yellow Flag
Is shown to the drivers to warn them about incidents ahead. You should reduce your speed and refrain from overtaking unless stated otherwise. If you illegally passed cars under yellow you will be asked to give those positions back. Failing to do so within 15 seconds will result in a penalty. Blue Flag
Indicates a faster car approaching from behind, and is typically shown on your out lap or when being lapped. Let the driver pass safely to avoid a penalty.
You have 10 sec to do so, before receiving a first warning, and another 10 sec before receiving a Drive Through Penalty. White/Black Flag
This flag is a warning handed to the driver for going off track / driving the wrong way / etc. White Flag
The white flag warns you about a slow car on track. This could be a damaged car trying to make its way back into the pits, a driver rejoining the track after losing control, or a car from a slower class. Black Flag
The one flag no driver wants to see. If you are receiving a black flag you have been disqualified. Chequered Flag
The chequered flag is being shown when the winner crossed the finish line and the race is ending.
fonte Sector3 forum