Bonta's short poem is about a person who thinks of the road not as a place to rest but as something to pass through. The speaker "seldom sit[s]" on it, and the opening lines suggest a life of motion rather than settling. The odd, quiet phrase "the difference between fleet and gone" seems to be about listening closely: moving quickly is not the same as disappearing, and the road is where that distinction can be heard.
The middle of the poem turns weary. "Weary of staying / to pay for air" suggests that staying put has a cost, as if simply being somewhere requires payment. The speaker wants out of that arrangement.
The final image is the most striking. "How little I would keep / like an office at night" pictures an empty workplace, lights off, nothing personal left. The speaker wants to own very little. The mood is spare, calm, and a little wistful, a mix of freedom and tiredness, with the road offering a lighter way to live.