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 early 2017.

Project history 

  • 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): 2019
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

Two-thirds of WestConnex is being built in underground tunnel, minimising impacts on the surface. We plan to use the disused Rozelle Rail Yards for the proposed Rozelle Interchange to limit the number of properties needed for construction of the M4–M5 Link. 
It is expected a small number of properties near Victoria Road and Iron Cove Bridge and some commercial properties near the Rozelle Rail Yards will need to be acquired for the project. 
Roads and Maritime Services has been in contact with all affected property owners in this location.  

 

All Sydney road tunnels have management plans that involve monitoring tunnel air quality 24-hours a day and they must comply with independent pre-determined guidelines for in-tunnel air quality. 

The WestConnex air quality management plan will follow stringent guidelines and take account of the final design of the route, the length of each section of tunnel and the location of ventilation outlets. 

For more information, visit Air quality.

Geotechnical investigations involve taking core samples from the earth to understand the conditions underground and develop a geological profile of the area. 

We carry out geotechnical drilling along the WestConnex corridor, concentrating on locations where information on the ground conditions is not already available.

Geotechnical investigations involve:

  • Identifying underground services and utilities and marking out locations for each borehole.
  • Setting up a safe work area with appropriate environmental controls.
  • Managing traffic and pedestrians where required to ensure the safety of motorists, residents and workers.
  • Collecting borehole soil and rock samples.

The information gathered helps to inform our designs, and work out the best sub-surface conditions for underground road tunnels.