Why is Saint Christopher the patron saint of travelers?

As the story goes, the extremely robust Christopher devoted his life to carrying people across an otherwise unfordable stream. One day a little child appeared before him and asked to be carried across. To Christopher's surprise, as he forded the river, the child steadily increased in weight until Christopher found his tiny burden so heavy that it was amost impossible to bear. When he asked the holy babe why he weighed so much, the child replied that he carried the world's sins upon his shoulders. As a reward for his service, Christopher's staff was miraculously transformed into a living tree, and Christopher himself became the Patron Saintof travellers. christopher means- ''christ carrier''