Class I Railroads

BNSF Railway Co.
Canadian National Railway Co.
Conrail
CSX Corp.
Ferrocarril Mexicano S.A. de C.V.
Kansas City Southern (KCSR and KCSM)
Norfolk Southern Corp.
Union Pacific Corp.

Short-Line & Regional Railroads

Aberdeen & Rockfish Railroad Co.
Aberdeen, Carolina & Western Railway
Alaska Railroad
Albany & Eastern Railroad Co.
Alexander Railroad Co.
Anacostia & Pacific Co. Inc.
Arkansas & Missouri Railroad
Ashtabula, Carson & Jefferson Railroad
Bay Colony Railroad
Belt Railway Co. of Chicago
Canton Railroad
Central Midland Railway
Chicago SouthShore and South Bend Railroad
Columbia Basin Railway Co.
East Camden & Highland Railroad Co.
Effingham Railroad Co.
Escanaba & Lake Superior Railroad Co.
Essex Terminal Railway Co.
Farmrail Corp.
Finger Lakes Railway Corp.
Florida East Coast Railway
Fort Worth & Western Railroad
Genesee & Wyoming Inc.
Georgetown Railroad Co.
Greenville & Western Railway Co. L.L.C.
Heart of Georgia Railroad Inc.
Hoosier Southern Railroad
Illinois Western Railroad Co.
Indiana Harbor Belt Railroad Co.
Indiana Rail Road
Iowa Interstate Railroad Ltd.
Iowa Northern Railway
Iowa Pacific Holdings L.L.C.
Iowa, Chicago & Eastern Railroad Corp.
Lake State Railway Co.
Lancaster & Chester Railway
Livonia, Avon & Lakeville Railroad Corp.
Madison Railroad
Maryland Midland Railroad Co.
Meridian Southern Railway L.L.C.
Middletown & Hummelstown Railroad Co.
Mississippi Export Railroad Co.
Modesto & Empire Traction Co.
Montana Rail Link
Montreal, Maine & Atlantic Railway Ltd.
Mt. Hood Railroad Co.
New Jersey Rail Carriers L.L.C.
New Orleans Public Belt Railroad
New York Susquehanna & Western Rail Co.
North Shore Railroad System
Ohio Rail System
OmniTrax
Ontario Northland
Pacific Harbor Line Inc.
Paducah & Louisville Railway Inc.
Pan Am Railways
Patriot Rail
Pinsly Railroad
Pioneer Railcorp
Port Jersey Railroad Co.
Progressive Rail Inc.
R J Corman Railroad Co.
RailAmerica Inc.
Reading & Northern Railroad
Red River Valley & Western Railroad Co.
Rio Grande Pacific Corp.
Santa Fe Southern Railway Inc.
Santa Maria Valley Railroad Co.
Seminole Gulf Railway L.P.
Sierra Railroad Co.
South Carolina Public Railways
Southern Railway of British Columbia Ltd.
Strasburg Rail Road Co.
Tishomingo Railroad
Tri County Rail Co.
Tulsa-Sapulpa Union Railway Co.
Twin Cities & Western Railroad Co.
Vermont Rail System
Virginia Railroad Association
Watco Cos. Inc.
Western New York & Pennsylvania Railroad
Wisconsin & Southern Railroad Co.

U.S. Passenger Rail Systems

American Public Transportation Association
Amtrak
Amtrak - California
Amtrak - Coast Starlight
Amtrak - Northeast Corridor
Amtrak - Texas Eagle
California - Alamont Express
California - Bay Area Rapid Transit
California - Caltrain
California - Los Angeles MTA
California - Market Street Railway
California - Metrolink
California - Muni
California - Sacramento RTA
California - Santa Clara Valley TA
Colorado - Denver RTA
District of Columbia - Washington Metropolitan Area Transit Authority
Florida - Tri-Rail
Georgia - MARTA
Grand Canyon Railway
Illinois - Chicago Transit Authority
Illinois/Indiana - South Shore Line
Louisiana - New Orleans RTA
Maryland - Maryland MTA
Massachusetts - MBTA
Missouri - Metrolink
New Jersey - New Jersey Transit
New York - MTA New York City Transit
New York/New Jersey - Port Authority Trans-Hudson Corp.
North Carolina - North Carolina DOT Rail Division
Oregon - Tri-Met
Pennsylvania - Port Authority of Allegheny County
Pennsylvania - Southeastern Pennsylvania Transportation Authority
Texas - Dallas Area Rapid Transit
Virginia - Virginia Railway Express
Washington - Sound Transit
Wisconsin - Kenosha Transit

International Passenger Rail Systems

Africa - Spoornet
Australia - CityRail
Australia -- RailCorp
Australia - Trams of Australia
Australia - TranAdelaide
Australia - West Coast Railway
Austria - Austrian Federal Railway (German)
Belgium - Belgische Eisenbahnen Belgian National Railway (English, German, French)
Belgium - Bruxelles/Brüsel/Brussels (Dutch, French)
Belgium - Charleroi (French)
Canada - Société de transport de la Communauté urbaine de Montréal (French, English)
Canada - Toronto Transit Commission
Canada - VIA Rail Canada
Denmark - Danish State Railways (Danish)
Finland - Finnish Railways (English, Finnish)
France - Lille Transpole Network (French)
France - SNCF (English, French)
Germany - Deutsche Bahn (English, German, French)
Germany - Wuppertal, the Schwebabahn suspended railway (German, Dutch, French, English)
Israel - Israel Railways (Hebrew)
Italy - Azienda Trasporti Municipali (Italian, English)
Italy - FS Online: Ferrovie (Italian, English)
Italy - Napoli (Italian)
Japan - Nagoya Railroad (Japanese)
Malaysia - Keretapi Tanah Melayu Berhad
Netherlands - Netherlands Railways (Dutch)
New Zealand - Tranz Rail Holdings
Norway - Norwegian State Railways (Norwegian)
Portugal - Portuguese Railways (English, Portuguese)
Singapore - Singapore Mass Transit Railway (English)
Spain - RENFE, Spanish National Network of Railways (Spanish, English)
Switzerland - Appenzeller Bahnen (German)
Switzerland - Bremgarten-Dietiken-Bahn (German)
Switzerland - Furka-Oberalp-Bahn (German, English, French)
Switzerland - Golden Pass (English, German)
Switzerland - Jungfrau Railways (German, English, French)
Switzerland - Montreux-Oberland-Bahnen (German, French, English)
United Kingdom - Croydon Tramlink
United Kingdom - Docklands Light Railway
United Kingdom - Eurostar
United Kingdom - Gatwick Express
United Kingdom - Regional Railways Northeast
United Kingdom - Virgin Trains

Industry Associations

American Association of Private Railroad Car Owners (AAPRCO)
American Association of Railroad Superintendents (AARS)
American Public Transportation Association (APTA)
American Railway Engineering and Maintenance of Way Association (AREMA)
American Short Line and Regional Railroad Association (ASLRRA)
Asociación Internacional Ferroviaria (AIF)
Association of American Railroads (AAR)
Association of Car Accounting and Car Services Officers (ACACSO)
Institution of Railway Signal Engineers (IRSE)
Intelligent Transportation Society of America (ITS)
Intermodal Association of North America (IANA)
League of Railroad Industry Women (LIRW)
National Association of Rail Shippers (NARS)
National Association of Railroad Passengers (NARP)
National Association of Railway Business Women (NARBW)
National Corridors Initiative (NCI)
National Industrial Transportation League (NITL)
North American Railcar Operators' Association (NRCOA)
Operation Lifesaver
Railway Association of Canada (RAC/ACFC)
Railway Engineering-Maintenance Suppliers Association (REMSA)
Railway Industrial Clearance Association of North America (RICA)
Railway Supply Institute
Railway Systems Suppliers Inc. (RSSI)
Railway Tie Association (RTA)
The American Passenger Rail Coalition (ARPC)
The National Railroad Construction and Maintenance Association Inc. (NRC)