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 is the final and most critical component of WestConnex, featuring twin mainline 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 project will also include an interchange at Rozelle with provision for a future connection to the Western Harbour Tunnel and BeachesLink. It will include 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

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 which are addressed in the Environmental Impact Statement (EIS). 

On 18 August 2017, the M4-M5 Link Environmental Impact Statement was placed on public exhibition for a 60-day consultation period. During this consultation period, stakeholders were encouraged to review the EIS and make a formal submission about the project to be considered by the Department of Planning and Environment as part of its assessment of the project. 

A Submissions and Preferred Infrastructure Report (SPIR) has been prepared by Sydney Motorway Corporation on behalf of Roads and Maritime, and addresses all concerns and issues raised by the community, councils and government agencies in their submissions. 

Project history 

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 underway
    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 is committed to making a meaningful and long term contribution to the communities in which it operates by investing in community-focussed programs during construction of WestConnex.

Legacy is defined as delivering sustainable and lasting benefits to the local economy, community and natural environment.

Legacy projects will be identified and developed in consultation with the community, local councils and community groups.

The planning approval to construct each stage of WestConnex includes conditions to incorporate and deliver social and environmental outcomes including the requirement for an Urban Design and Landscaping Plan, a Social Cohesion Plan, and a Residual Land Management Plan.

Traffic modelling tells us the expected demand for WestConnex and the number of traffic lanes needed. The motorway has been designed to meet traffic demand now and in the future.

The number of lanes varies across the project: 

  • M4: the M4 Motorway has been widenedfrom three lanes in each direction to four lanes in each direction between Parramatta and Homebush. The new M4 East tunnels between Homebush and Haberfield will be three lanes in each direction.
  • New M5: when the tunnels open, there will generally be two lanes in each direction between Kingsgrove and St Peters. The tunnels can accommodate three lanes in each direction in future, with additional approvals needed for this change.
  • M4–M5 Link: The M4-M5 Link will provide twin underground tunnels with four lanes in each direction between Haberfield and St Peters.

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.