A song that you'd think had been done to death in the days when every self-respecting up-and-coming folk/blues musician wanted to sing an "authentic" work song about a tough steel-drivin' man: the romance of the railroad, a celebration of man vs. machine, and a eulogy for the glory days of American expansion west. Woody Guthrie sang it, and so, from the other side of the tracks as it were, did Merle Travis. That was about as good as it got.
And then there's Mississippi Fred McDowell:
Of related interest in case you missed it: an old photo of blues legend Robert Johnson has finally been authenticated. And very smart he looks, too.