What do the different racing flags mean?

Command Flags

	Flag	Term	Explanation
	Checkered Flag	Finish	Indicates that the race has concluded.
	Black Flag	Leave the Track	The car with the indicated number must proceed to the pit. Or the session is halted; all cars on course must return to pit lane
	Mechanical Flag	Meatball	The car with the indicated number has mechanical trouble and must proceed to the pit
	Red Flag	Stop	The race is stopped—all cars must halt on the track or return to pit lane

Information Flags

	Flag	Term	Explanation
	Green Flag	Start	The race has started or resumed after a full caution or stop. May also mean end of hazardous section of track
	Yellow Flag	Caution	Full course caution condition—pace car on track and no cars may pass. Hazardous section of track—speed limit in effect
	Surface Flag	Debris	Debris or slippery patches on the track. Surface may be unsafe
	Passing Flag	Move Over	A car must allow another car to pass. A car is being advised to give way to faster traffic approaching
	Emergency Flag	Ambulance or Red Cross	An ambulances, safety vehicles or emergency personnel are on the course. Waiving flag indicates emergency vehicle needed
	White Flag	One Lap to Go	One lap remains in the race before the checkered flag. It can also mean that there's a slow vehicle on the track