M4-M5 Link Tunnels

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M4-M5 Link Tunnels

(Haberfield to St Peters)

Also referred to as M4-M5 Link Mainline Tunnels.

Tunnels connecting the New M4 at Haberfield and the New M5 at St Peters. 

The M4-M5 Link is being delivered in two stages:

  • Stage one - construction of the M4-M5 Link Tunnels between the New M4 at Haberfield and the New M5 at St Peters and stub tunnels to the Rozelle Interchange. This stage is being managed by Sydney Motorway Corporation.
  • Stage two - construction of the Rozelle Interchange and Iron Cove Link. This stage is being managed by Roads and Maritime Services.

The M4-M5 Link Tunnels project is the final and most critical component of WestConnex, featuring twin tunnels between the New M4 at Haberfield and the New M5 at St Peters. Each tunnel will be approximately 7.5 kilometres long and able to accommodate up to four lanes of traffic in each direction. The M4-M5 Link Tunnels will be delivered as a stand-alone project, and provide an additional 2.5 hectares of green space in St Peters.

Environment and planning 

The M4-M5 Link Tunnels received NSW planning approval in April 2018. 

    Project history 

    Project stats

    Current status: Approved
    Construction start: 2018
    Open to traffic (pending planning approval): Early 2023^
     

    * Based on WestConnex Road Traffic Model V2.1, WestConnex Updated Strategic Business Case, November 2015
    ^ WestConnex Updated Strategic Business Case, November 2015
    ^^ Between Haberfield and Rozelle

    Industry partners

      Design and construct contract: Lendlease Samsung Bouygues Joint Venture 
      Operations and maintenance contract: Commitment deed in place with Fulton Hogan and Egis Joint Venture
      Tolling contracts: TBA

    What's happening now

    Local updates

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    FAQs See all

    WestConnex is generating more than 18 hectares of new open space for communities in the inner west. 

    We sometimes use parks and other government-owned land during construction. This helps us to avoid the acquisition of private property. When we use green space during construction, we always try to return it for community use when construction is finished. 

    Sydney Motorway Corporation (SMC) is committed to supporting western Sydney communities through key community partnerships and programs that provide long term benefits to those who need it most.

    SMC’s community partnerships with the GWS Giants and Wests Tigers will ensure positive and lasting outcomes for thousands of people based in western Sydney through the delivery of targeted community programs.  

    These programs deliver positive outcomes in health, education and skills, and harmony outcomes.

    The community partnerships are one part of SMC’s Community Connections Program, which also includes the SMC Community Grant Scheme.

    WestConnex is able to meet stringent air quality standards in the tunnels and the surrounding community using state-of-the-art ventilation and tunnel design. Filtration is not needed as it would not provide any measurable improvement to the air quality in the surrounding community.