M6 - Stage One

Under Delivery
M6 - Stage One

The M6 Extension Stage One will provide a new motorway connection between the New M5 Motorway at Arncliffe and President Avenue at Kogarah.

The project includes:

  • twin four-kilometre tunnels linking the New M5 Motorway at Arncliffe to President Avenue at Kogarah
  • ramps between the main motorway tunnel and the surface intersection at President Avenue
  • tunnel stubs for a future connection south to extend the M6
  • a new intersection at President Avenue including the widening and raising of President Avenue at this location
  • the upgrade of President Avenue/Princes Highway intersection to improve capacity and network integration
  • shared cycle and pedestrian pathways connecting Bestic Street, Brighton-Le-Sands to Civic Avenue, Kogarah including a new bridge over President Avenue
  • motorway support infrastructure including tunnel ventilation systems and a motorway control centre, and
  • new service utilities including a permanent power supply line.                           

Stage One (Arncliffe - President Avenue) is the first of the four study areas of the M6 corridor geotechnical analysis that proceeds to planning and development. The remaining three study areas and likely future stages of the M6 program are: 

  • President Avenue - Taren Point (Section B)
  • Taren Point - Loftus (Section C), and
  • Loftus - Waterfall (Section D).

Key Dates

May 2021 Contract Award
Nov 2021 Construction Commencement
Jan 2022 Expected Construction Commencement
Dec 2025 Expected Construction Completion

Funding contributions

NSW Government


Procuring Agency: Transport for NSW
Shortlist: - Acciona-Samsung Joint Venture (comprising Acciona Construction Australia and Samsung C&T Corporation), - Gamuda-BMD Joint Venture (comprising Gamuda Berhad and B.M.D. Constructions), and - CPB-Ghella Joint Venture (comprising CPB Contractors and Ghella).
Successful Tenderer: A Joint Venture of CIMIC Group companies CPB Contractors and UGL, with Ghella.


2016 The NSW Roads and Maritime Services (RMS), carried out geotechnical analysis and confirmed to proceed with the planning and project development of Stage One of the M6 road corridor in Southern Sydney.
Jan 2018 RMS submitted a State Significant Infrastructure (SSI) Application to the Department of Planning and Environment (DP&E) to identify topics that must be assessed in an Environmental Impact Statement (EIS) for the project.
Oct 2018 The project was issued with an Environmental Planning and Assessment Amendment Order to declare it eligible to be assessed as SSI. The Order is required to proceed through the SSI application process before a final decision is made. As part of the SSI process, the EIS was released for public consultation in November 2018.
Dec 2018 Submissions on the EIS closed.
Feb 2019 The NSW Government invited industry to pre-register for the M6 Stage One tenders. Pre-registration for the project covers the design, construction, and operation and maintenance of Stage One and was due by February 2019.
Oct 2019 The NSW Government opened Expressions of Interest.
Dec 2019 Planning approval for M6 Stage One was granted. The approved project is State Significant Infrastructure (SSI) and has been declared Critical State Significant Infrastructure (CSSI).
Apr 2020 The NSW Government announced a shortlist of three bidders to tender for design and construction of M6 Stage One.
May 2021 The NSW Government announced the contract was awarded to a Joint Venture of CIMIC Group companies CPB Contractors and UGL, with Ghella. The total estimated project cost was revealed as $2.52 billion. The total cost had previously been estimated as up to $2.6 billion. The estimated construction timeframe - commencing in 2022 and 2025 - was confirmed despite the contract award being delayed from the previous estimate of December 2020.
Nov 2021 Construction of the M6 motorway project began.
Estimated Total Cost
Procurement approach
Traditional Procurement |
New South Wales |
Infrastructure Australia status
Priority Initiative (medium-term, 5-10 years)
Project pages
Transport for NSW