Norfolk Southern Railway
CSX Transportation
BNSF Railway
Greyhound Lines
Union Pacific Railroad
Conrail
Via Rail
New York Central Railroad
Canadian National Railway
Penn Central Transportation Company
Atchison, Topeka and Santa Fe Railway
Canadian Pacific Railway
Long Island Rail Road
American intercity passenger rail operator
amtrak.com
The National Railroad Passenger Corporation, doing business as Amtrak, is the national passenger railroad company of the United States. Wikipedia