This has little to do with trains other than the fact that I listen to this song while playing MSTS, I just need a little help…
“Six days on the road” , it has a million versions, and I remember one specific version of the song, but don’t know which is the author…
Its an older recording, and starts with drums, has a sort of like a drum intro, almost like a drum roll, very short, then the singer has some polyphonic vocal help at the begining, then when it comes to “there’s a speed zone ahead…” he continues solo.
It also features one of those low pitched “cowboy” guitar parts (like the ones used in sphagetti westerns)
It was written by Earl Green & Carl Montgomery,and first recorded by Dave Dudley in 1963.
Could this be the version you’re after?
It was also performed regularly by the “New Riders” in the 70s.