Here is a list of railroads, past and present.

• Southern Pacific
• ATSF
• BNSF
• Union Pacific
• Canadian National
• CSX
• Norfolk Southern
• Conrail
• Burlington Northern
• Amtrak
• Kansas City Southern
• Canadian Pacific
• Burlington Northern Santa Fe
• Great Northern
• Santa Fe
• Illinois Central
• Milwaukee Road
• Northern Pacific
• Soo Line
• Missouri Pacific
• Alaska Railroad
• Baltimore Ohio
• VIA Rail
• Rock Island
• Denver Rio Grande Western
• Grand Trunk Western
• Atchison Topeka Santa Fe
• CP Rail
• Chicago North Western
• Wisconsin Central
• New York Central
• American Association of Railroads
• Regionals and Short Lines
• The Milwaukee Road
• CB Q
• Mid American Class Is
• Via Rail Canada
• BC Rail
• Canadian Pacific Railway
• Mid Atlantic Rail Study
• Alameda Corridor Transportation Authority
• Federal Railroad Administration
• Copper Range Rail Road (CRRR)