This was inspired moments ago by The First of Autumn by Enya. Note the dual meaning of the word “express” in the title.

Nice job on the metaphor/allegory. The start was a little rocky as we jump right into it. I even think the sentence, “The train came…” could be broken up, as right now it’s a run-on, though I know the whole thing was meant to have a running feel to it.
At first it felt kind of overwhelmed and helpless, but I like how by the end the effort is rewarded by catching up and getting to go on a wild ride.

Fixed the opening sentence. Thanks!