BNSF Railway

BNSF, of Berkshire Hathaway fame, is Union Pacific's main rival. The largest freight railway in the United States, it formed in the 1990s after the Burlington Northern and the Atchison, Topeka & Santa Fe joined forces. You know it's BNSF when the locomotives are orange. The typical BNSF train would be led by one or (in most cases) more General Electric diesels.