AMOG was engaged by the CPB Samsung and John Holland Joint Venture to undertake Reliability, Availability, Maintainability and Safety Assurance (RAMS) studies for the WestConnex M4 East Tunnel and the WestConnex M5 Tunnel in New South Wales, Australia.

The objective of the RAMS program was to provide progressive assurance during the design phase so that the M4 East (M4E) and M5 systems would meet or exceed design requirements for reliability, availability, maintainability and safety, in order to minimise ongoing risks, ensure safety, and reduce the ongoing demand for maintenance and support.

The RAMS programme was conducted in accordance with EN50126 (RAM) and AS61508 (Safety) and the scope of work included all mechanical and electrical systems and OMCS, which was required to be SIL rated.

  • Proj WestConnex M4 470x423M4, NSW
  • Proj WestConnex M5 470x423M5, NSW


About the M4 and M5:

The M4 East Project comprised two new, three-lane carriageways (Main Carriageway, Eastbound or Eastbound Carriageway and Main Carriageway Westbound or Westbound Carriageway), generally beneath Parramatta Road (together with the "Main Carriageways"). The Main Carriageways were to be constructed between the eastern end of the M4 West Motorway near Homebush Bay Drive and the City West Link and Parramatta Road at Haberfield.

The New M5 was Stage 2 of the WestConnex infrastructure project, constructed in Sydney NSW, and building a link between the M4 and the M5, as well as widening the sections of both of these motorways.