<P> In some series, a white flag is shown from all flag stations on the first lap of a practice or qualifying session so competitors will know which stations are manned . </P> <P> Instruction flags are usually used to communicate with one driver at a time . </P> <P> The solid black flag is used to summon a driver to the pits . It is usually associated with a penalty imposed on the driver for disobeying the rules, but may also be used when a car is suffering a mechanical failure, leaking fluid, exhibiting damage such as loose bodywork, loose hood, dragging bumper, or any other damage that could potentially become a hazard to the driver or other competitors . In some cases, the black flag may be used to call a driver to the pits when their radio is not working . </P> <P> In FIA International - permitted series, the black flag means an immediate disqualification for the driver involved . The car number of the summoned driver is displayed on the finish line . Some sanctioning bodies wave the black flag at all observation posts simultaneously to order all drivers to clear the track after the starter waves the red flag, often in the case of a serious accident . </P>

What does a black flag mean in racing
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