Becky, are you sure you don't mean Frank Donovan? Hubbard edited The Phantom Brakeman and Other Railroad Stories and The Roundhouse Cat and Other Railroad Animals but these were both stories for kids. He did, of course, edit Railroad Avenue but that is a compliation of real life events.
Donovan, on the other hand, edited Headlights and Markers: An Anthology of Railroad Stories which is a collection for adults