Check Out These Common Open Track Rules.
FLAG SIGNALS
Here are the common open track flags and what they usually signal.

Green Flag: The session has started the track is active (a.k.a. hot).

Checkered Flag: The session has ended. Complete a slower cool down lap then exit the track.

Caution Flag: (Waving) Hazard is on track, proceed cautiously. (Standing) Hazard is near track. Slow down and do not pass.

Passing Flag: Allow faster cars behind you to pass. This flag is only displayed to individual cars, as needed.
Black Flag: (Standing) All cars must exit the track
this lap. (Pointed) The car pointed at, must exit track this lap and report to starter stand.
Red Flag: Slow down, pull over to the side of the track and come to a safe stop. Typically means emergency vehicles
needed on track.

White Flag: Signals the last lap of the session. This flag is rarely used for open track events.
Always confirm all flag signals with track or event organizers before going out on track.
