Jalinan Engineering Sdn. Bhd.
- Malaysia based railway signalling and telecommunication engineering services provider. Digital transmission systems, block tokenless system and optical fibre cable networks.
- http://www.jalinan.com.my/

Magnate Grey Box Ltd.
- Design, manufacture, test and supply railway signalling equipment housings to the UK and overseas markets.
- http://www.mgbl.co.uk/

Selectrix Industries
- Suppliers of railway signalling equipment and electrical supplies.
- http://www.selectrix.com.au/

AŽD Praha s.r.o.
- Signalling, interlocking and level crossings equipment; automatic control systems.
- http://www.azd.cz/

Rebel Railway Supply Company LLC
- Supplier of railroad signal and lighting equipment.
- http://www.rebelrail.com/

C3 Trans Systems LLC.
- Manufacturer of low-cost highway-railroad crossing systems.
- http://www.c3trans-systems.com

Railroad Controls Limited
- suppliers of grade crossings, signals, communications, Automated Horn System (AHS), Exit Gate Management System (EGMS), Trouble Reporting System (TRS), and a railroad crossings online database.
- http://www.railroadcontrols.com/

Alcatel Transport Automation Solutions
- Railway telecoms and communications.
- http://www.alcatel.com/tas/

Westinghouse Signals Australia
- Supplier of railway signalling equipment and systems.
- http://www.westsig.com.au/

Westinghouse Rail Systems Ltd UK
- Suppliers of signalling and train control equipment.
- http://www.westsig.co.uk

L&W Industries, Inc.
- Railway supply company offering a complete line of signal products.
- http://www.lwind.com

CADIZM
- Railway signal designers, specialising in scheme design, records updates and virtual reality railway modeling.
- http://www.cadizm.com

J&A Industries, Inc.
- Signal, communication and related parts and services.
- http://www.railmart.com

Alstom Rail Signaling
- Suppliers of Automatic Train Protection ATP railway safety signalling systems.
- http://www.railway-technology.com/contractors/signal/westinghouse/index.html