on the road
on the road {adv.} or {adj. phr.}
1. Traveling; moving from one place to another.
When we go on vacation, we take a lunch to eat while on the road.
Mr. Smith is on the road for his insurance company.
2. Changing; going from one condition to another.
Mary was very sick for several weeks, but now she is on the road to recovery.
Hard study in school put John on the road to success.
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Source: A Dictionary of American Idioms