1
general::
Phrase(s): hit the road
Fig. to depart; to begin one’s journey, especially on a road trip; to leave for home. • It’s time to hit the road. I’ll see you. • We have to hit the road very early in the morning.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Also, hit the trail. Set out, as on a trip. For example, Come on, it's time to hit the road, or Jack hit the trail at dawn. [Late 1800s]
American Heritage Idioms