Midnight Special

The Midnight Special was a train that went past the Central Texas Penitentiary every night at, well, midnight.  Its headlight would shine through the windows.  The men inside drew hope of freedom from this nightly occurrence.

https://www.youtube.com/watch?v=ezR896BYu0E

Lead Belly, 1939

https://www.youtube.com/watch?v=cu7gafphe9M

This is probably the one you think of when you think of this song

https://www.youtube.com/watch?v=T00eJSQimIk