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. 

Community Information Sessions  

Session 1

Wednesday, 27 March
4.00pm to 7.00pm
158 Australia Street, Newtown

Session 2

Saturday, 30 March
10.00am to 1.00pm
M4-M5 Link Community Information Centre - 201 Parramatta Road, Haberfield

    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

    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

    We fully recognise the importance of Sydney Park and the investments that the City of Sydney Council and others have made in recent years.

    A strip of land owned by Roads and Maritime Services adjacent to Sydney Park is being used to widen Euston Road as part of local road upgrades. This is not part of Sydney Park.

    As outlined in the City of Sydney’s own management plan for Sydney Park, this land is dedicated road space and has been subject to a long-standing road widening reservation.

    A small boundary strip, adjacent to the road reserve, is also required for the local road widening, however this is more than offset by the additional 8.5 hectares of open green space being created at St Peters Interchange.

    Two hectares of this open green space will be directly connected to Sydney Park via a land bridge over Campbell Road.

    Only once a year. Unlike the majority of New South Wales motorways which increase quarterly, WestConnex tolls increase annually on 1 January.  There will be a maximum increase per annum of four per cent or the consumer price index (CPI) – whichever is greater – until 2040. After that, CPI will apply. Read more about WestConnex tolls.

    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: 

    • New M4: the New M4 has been widened from three to four lanes in each direction between Parramatta and Homebush. The New M4 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 Tunnels: The M4-M5 Link Tunnels will provide twin underground tunnels with four lanes in each direction between Haberfield and St Peters.