In
auto racing
, the starter will wave the black flag from the start tower to signal a particular driver to pull into the pits and consult a race steward. The number of the car in question is displayed from a bracket on the start tower.
Public domain
Public domain
false
false
This image of
simple geometry
is
ineligible for
copyright
and therefore in the
public domain
, because it consists entirely of information that is common property and contains no original authorship.