The yellow brick road is a central element in the 1900 children's novel The Wonderful Wizard of Oz by American author L. Frank Baum. It also appears in several Oz books, such as The Marvelous Land of Oz (1904) and The Patchwork Girl of Oz (1913). The road's most notable depiction is in the classic 1939 MGM musical film The Wizard of Oz, loosely based on Baum's first Oz book. In the novel's first edition, the road is mostly referred to as the "Road of Yellow Bricks". In the original story and in later films based on it, such as The Wiz (1978), Dorothy Gale must find the road before embarking on her journey, as the tornado did not deposit her farmhouse directly in front of it as in the 1939 film.

Source: Wikipedia