Noun
white zone (plural white zones)
(US, California) An area of a street where the curb has been painted white, indicating that the spot is only to be used for the immediate loading or unloading of passengers, baggage or freight, or for short-term parking, and (in some places, such as airports) that a vehicle is not to be left unattended.
It was first surmised by the ancient philosopher, Democritus, that the faintly white zone which spans the sky under the name of the Milky Way, might be only a dense collection of stars too remote to be distinguished. This conjecture has been verified by the instruments of modern astronomers. Robert Chambers (publisher born 1802)