15

The session is halted, all cars on course must return to pit lane. May also be seen combined with a green flag to indicate oil on track, typically referred to as a 'pickle' flag combination.
	The car with the indicated number has mechanical trouble and must pit.
	The driver of the car with the indicated number has been penalized for misbehaviour.
	The driver of the car with the indicated number is disqualified or will not be scored until they report to the pits.
	The car should give way to faster traffic. Depending on the series this may be a command or merely advisory.	A car is being advised to give way to faster traffic approaching.
	The session is stopped. All cars must halt on the track or return to pit lane.
	Depending on the series, either one lap remains or a slow vehicle is on the track.	A slow vehicle is on the track.
	The session has concluded.

Accidents[edit]

For the worst accident in racing history see 1955 Le Mans disaster. (See also Deaths in motorsports)

Racing-car setup[edit]

Main article: Racing setup

In auto racing, the racing setup or car setup is the set of adjustments made to the vehicle to optimize its behaviour (performance, handling, reliability, etc.). Adjustments can occur in suspensions, brakes, transmissions, engines, tires, and many others.