iRMX III on Intel Multibus hardware is used in the majority core systems on CLSCS the London Underground Central line signals control system was supplied by Westinghouse now Invensys and commissioned in the late 1990s.
Oslo Metro or Oslo Tunnelbane uses a similar although less complex Westinghouse supplied iRMX control system through the central Common Tunnel or Fellestunnelen tracks but was expected to be decommissioned in 2011.