M4-M5 Link

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M4-M5 Link

(Haberfield to St Peters)

Tunnels connecting to the M4 East 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

Early planning on this project is currently underway.

This is being supported by a community and stakeholder engagement program

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 

  • 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 2017 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: Early 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

Sydney Motorway Corporation and Roads and Maritime Services have no plans to change the existing clearways on King Street.

By moving traffic into underground tunnels, WestConnex will remove traffic from local roads. Traffic modelling, ticked off by independent infrastructure experts. shows the inner south will benefit from the construction of WestConnex as opposed to a do-nothing scenario. 

The City of Sydney SGS Economics and Planning report confirms "... parts of the inner south will see a reduction in traffic on local roads, as through-traffic is diverted into the motorways, especially the tunnel constructed as part of Stage 3”.

The M4–M5 Link will provide a bypass of the Princes Highway/King Street and by 2031 (compared to a situation without WestConnex):

  • Afternoon average travel times on local roads around St Peters will be cut by 26 per cent 
  • Average speeds on local streets will increase by 74 per cent 
  • Heavy vehicle volumes on King Street, Newtown will drop by 54 per cent compared to conditions without WestConnex
  • Car numbers on King Street will be reduced by 10 per cent. 

Tolls will only be charged once new or significantly upgraded sections of road are opened to motorists.

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.