Iarnrod Eireann
Infraco BCV
Infraco JNP
Interserve Project Services
Jarvis Rail Facilities
Jenbacher Transport
Kowloon-Canton Railways Corporation
May Gurney
Mechan
Metronet
National Power PLC
National Railway Supplies
Network Rail
N.Ireland Railways Company Ltd.
NRS
NYMR
Parkman
Queensland Railways Company Ltd.
Railpart (UK) Ltd.
Rail Tech East Anglia
Railpart
Railtrack
Rowlescourt Engineering
S.N.C.F.
Servirail Construction

Siemens AG Transportation Systems
South African Railways Corporation
South West Trains
Thales
Tracklink UK
Tube Lines
Ulsterbus
Union Carriage Works
University Power Systems
Westinghouse Rail Systems

ACT
Alcatel
Alstom T.I.S.
AMEC Spie Rail Ltd.
Amey Railways Ltd.
Amtrack
ARC Southern
A.S.T.E.
Balfour Beatty Rail Infrastructure
Balfour Beatty Rail Projects
Beck & Pollitzer
Bombardier Transportation
Brush Traction
Carillion Rail
Catalis
CDS Rail
Clough Smith Rail
Collis
Daewoo
Exel Logistics
First Engineering Ltd.
General Motors of Canada
GE Transportation Systems
Grant Rail
GTRM