I don't remember the exact details, but the State of North Carolina owns/subsidizes some trains and has specially painted locomotives: Harold
Here is another photo, of a much more "interesting" unit (in my opinion): These units (if I can remember the story correctly ) were rebuilt from GP40's (possibly ex-CSX units). I have pictures of them when they were newly rebuilt, many years ago. I have more Amtrak unit pictures added to my site (see link below in my signature line) in the "Foreign Power" section. Enjoy! Harold