M4-M5 Link

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M4-M5 Link

(Haberfield to St Peters)

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

The M4-M5 Link project includes an interchange at Rozelle with provision for a future connection to the Western Harbour Tunnel and BeachesLink. It also includes an underground tunnel from the Rozelle Interchange to Victoria Road near Iron Cove Bridge, known as the 'Iron Cove Link'.

The interchange in Rozelle will be mostly underground and located at the site of the old Rozelle Rail Yards. By building the interchange mostly underground, the project will deliver new active transport options in Rozelle and up to 10 hectares of new green space. The M4-M5 Link will also provide an additional 2.5 hectares of green space in St Peters.

Current status

Planning on this project is currently underway.

This is being supported by a community and stakeholder engagement program

M4-M5 Link Concept Design now available 

The M4-M5 Link Concept Design has been released for community feedback.

The design shown has been informed by the results of technical investigations and community feedback to date.

We are seeking feedback on the M4-M5 Link Concept Design from stakeholders and the community. All feedback will be considered and, wherever we can, we will use your ideas to help create better outcomes for the community. Feedback on the Concept Design should be made on or before the 4th of August to be considered as part of the EIS preparation. Formal submissions on the M4-M5 Link EIS can be made during the EIS consultation period, which will commence upon its release in mid-August.

Environment and planning 

In January 2016, we lodged a State Significant Infrastructure Application Report for the M4-M5 Link. This was the first step in the planning approval process. In March 2016, the Department of Planning and Environment issued the Secretary’s Environmental Assessment Requirements (SEARs) for the project. The SEARs define comprehensive environmental assessment requirements to be addressed by the project’s Environmental Impact Statement (EIS). This is being prepared and will be exhibited in mid-2017.

Project history 

  • May - June 2017 - Community information sessions hosted across the M4-M5 Link project area, to support the release of the M4-M5 Link Concept Design. 
  • 12 May 2017: M4-M5 Link Concept Design released for community feedback.
  • March 2017: Sydney Motorway Corporation lodged the M4-M5 Link State Significant Infrastructure Report Addendum 2.  
  • 11 November 2016: Minister for Roads Duncan Gay announced new design features for the M4-M5 Link, with potential for the M4-M5 Link twin tunnels to be completed early, capacity increasing from three to four lanes in each direction and exit and entry ramps at Camperdown removed.
  • 15 November 2016: The Community Feedback Report containing community feedback and ideas gathered through consultation in July and August 2016 was released. 
  • 21 November 2016: Expressions of interest for contractors to design and construct the M4-M5 Link main tunnel works were called.
  • September 2016: Sydney Motorway Corporation lodged the M4-M5 Link State Significant Infrastructure Report Addendumwhich includes the Rozelle interchange and Iron Cove Link.
  • August 2016: Community ideas sessions hosted across the M4-M5 Link project, supported by an online collaborative map. 
  • July 2016: Premier Mike Baird announced key features of the Rozelle Interchange, including up to 10 hectares of new green space and an underground road link between Rozelle and the Iron Cove Bridge.
  • Early 2016: Geotechnical and other surveys and investigations underway to inform the early design options for the project.
  • Early 2016: Consultation with key stakeholders started.
  • March 2016: The Department of Planning and Environment issued the Secretary’s Environmental Assessment Requirements for the project.
  • January 2016: Sydney Motorway Corporation lodged the M4-M5 Link State Significant Infrastructure Application Report, which is the first step in the planning approval process.
  • November 2015: WestConnex Updated Strategic Business Case published, including a proposal for the M4-M5 Link. 
  • September 2013: WestConnex Strategic Business Case – Executive Summary published, including an early proposal for the M4-M5 Link. 

Project stats

Project value: $7.247 billion^
Current status: Planning
Construction start (pending planning approval): 2018
Open to traffic (pending planning approval): 2023^
Current traffic projections*: 105,000^^

* 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: Tender process yet to begin
    Operations and maintenance contract: Commitment deed in place with Fulton Hogan and Egis Joint Venture
    Tolling contracts: Tender process yet to begin

What's happening now

Local updates

To learn about work in an area or for a project, you can access a range of documents including work notifications, management plans, compliance tracking reports, maps and permits.

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FAQs See all

The M4–M5 Link geotechnical investigations are being carried out as ‘exempt development’ under clause 97(i)(h) of the State Environmental Planning Policy (Infrastructure) 2007 (ISEPP) in accordance with clause 20 of the ISEPP. No Environmental Management Plan is required for ‘exempt development’ under the Environmental Planning and Assessment Act 1979.

In a number of places, the investigations are being carried out under the Roads Act 1993, including under sections 71, 72 and 25.

WestConnex projects will open to traffic in stages between 2017 and 2023. See our Interactive map

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.