M4 East (New M4 Tunnels)

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In construction

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Project Timeline

M4 East (New M4 Tunnels)

(Homebush to Haberfield)

Extending the M4 Motorway in tunnels (New M4 Tunnels) between Homebush and Haberfield via Concord. Includes provision for the future connection to M4–M5 Link. 

The project is about 6.5km long (with 5.5km of the motorway in tunnel).

The M4 East is the first underground section of WestConnex. It will connect to the widened M4 and extend it via twin motorway tunnels (New M4 Tunnels) from Homebush to Haberfield with three lanes in each direction. The M4 East will alleviate the frustrating delays and gridlock that motorists face daily when they come off the M4 and hit a standstill on Parramatta Road.

Environment and planning The M4 East received planning approval in February 2016 and work started in March 2016.  

Legacy The Legacy Project aims to provide safe, vibrant and high quality open spaces for communities impacted by construction of the New M4 by delivering 5.76 hectares of additional land for community use and improving existing spaces. Read more.

Project history

  • May 2018 - Toll testing commenced on three gantries east of Homebush Bay Drive
  • February 2018 - The first of the specially built acoustic sheds is dismantled at the Concord Road site.
  • February 2018 - Third meeting of Air Quality Community Consultative Committee held.
  • February 2018 - Final girder lifted at the Concord Road Interchange. 
  • February 2018 - Community information sessions held across the project corridor.
  • February 2018 - Second revision of Urban Design and Landscape Plan.
  • November 2017 - Second meeting of Air Quality Community Consultative Committee held.
  • October 2017 -  Landscaping begins in sections as construction milestones are completed.
  • October 2017  Community information sessions held across the project corridor.
  • October 2017 - Powells Creek westbound on-ramp opens to traffic
  • September 2017 - First girders installed at the Concord Road Interchange.
  • June 2017 - Tunnel excavation reaches its half way point
  • June 2017 - Second round of Legacy workshops/information sessions held across the corridor.
  • June 2017 - First meeting of Air Quality Community Consultative Committee held.
  • April 2017 - 21 roadheaders now underground
  • 21 March 2017 - WestConnex M4 East project raised $50,000 for the World's Greatest Shave. Expressions of interest sought for Air Quality Community Consultative Committee. 
  • 13 March 2017 - Legacy Workshop for local government held at Sydney Motorway Corporation.
  • 8 March 2017 - Legacy Workshop for Strathfield community members held at Ashfield.
  • 7 March 2017 - Legacy Workshop for Inner West community members held at Ashfield.
  • 2 March 2017 - M4 East Community Information Session held at Ashfield.
  • 1 March 2017 - M4 East Community Information Session held at Strathfield.
  • 27 February 2017 - M4 East Community Information Session held at Concord.
  • 22 February 2017 - Draft addendum to the UDLP, containing plans for the eastern and western ventilation facilities, released for a month-long public comment period.
  • January 2017 - Submissions sought for draft addendum to the UDLP.
  • December 2016 - Expressions of interest sought for Legacy Project.
  • November 2016 - Mainline tunnelling begins at Cintra Park tunnel construction site.
  • 26 October 2016 - NSW Premier Baird and NSW Minister Gay together with Federal Minister Fletcher attend the opening of the M4 East and New M5 Training Academy at Homebush.   
  • 19 September 2016 - Draft Urban Design and Landscape plan released for a month-long public comment period.
  • September 2016 - Heritage Salvage Catalogue released for public display. Community members were invited to register their interest in obtaining items.
  • September 2016 - G-Loop construction in Reg Coady Reserve underway. The G-loop will significantly reduce the travel distance for spoil-haulage vehicles.
  • 18 August 2016 - Four piling rigs in progress at the Homebush Bay Drive construction site.
  • 8 August 2016 - Roadheader is installed at the Underwood Rd tunnelling construction site.
  • 25 July 2016 - Parramatta Rd Ventilation Facility piling commenced. 
  • 18 July 2016 - Launch of tunnelling excavation at Cintra with Premier Baird and Minister Gay. 
  • 16 July 2016 - Cintra Park tunnelling commenced. 
  • June 2016 - Acoustic shed steel work complete at Underwood Rd and Cintra Park tunnel construction sites. 
  • May 2016 - Construction work commences at all tunnel and surface works sites. Two roadheaders and a rock bolting rig delivered to the Cintra Park tunnel construction site.
  • April 2016 - Site establishment works carried out at Sydney St, Northcote St and Concord Rd. 
  • 4 March 2016: A 'breaking ground' ceremony was held at Cintra Park in preparation for the first WestConnex twin tunnels linking Homebush and Haberfield at Cintra Park in Concord. The ministerial event was held on site to witness the beginning of foundation works.
  • 19 February 2016: Planning approval for the M4 East project was received from the NSW Minister for Planning.
  • 7 February 2016: WestConnex delivered its first completed project to the local community; new hockey facilities at St Lukes Park in Concord.
  • December 2015: A Submissions and Preferred Infrastructure Report was prepared in response to submissions received during the EIS exhibition period. The report was considered by the Department of Planning and Environment and informed the Minister for Planning, in the projects approval assessment.
  • 9 September 2015: An Environmental Impact Statement (EIS) was on display for 55 days for public comment. The EIS describes the key features and benefits of the project, outlines the environmental and social impacts that may occur during construction and operation and details how these will be managed.
  • June 2015: CPB Contractors Samsung John Holland Joint Venture was selected to deliver the M4 East from Homebush to Haberfield.
  • April 2015: WestConnex agrees to build new sporting fields and amenities at St Lukes Park, Concord in place of the Cintra Park hockey field displaced by an M4 East tunnel site. 
  • August 2014: A shortlist of three consortia was announced and geotechnical investigations were carried out to support the tender process.
  • May 2014: Expressions of interest were called to build the M4 East.
  • 17 February 2014 – Community consultation on the M4 East concept design concluded and the community feedback report has been published.
  • November 2013: The planning application for the M4 East was lodged with the Department of Planning and Environment.


Project stats

Project value: 3.802 billion^
Current status: Open 
Construction start: March 2016
Open to traffic:  July 2019

^ WestConnex Updated Strategic Business Case, November 2015

Industry partners

    Design and construct contract: CPB Contractors, Samsung C&T Corporation and John Holland Joint Venture 
    Operations and maintenance contract: Fulton Hogan and Egis Joint Venture
    Tolling contracts: Roadside tolling equipment: Kapsch TrafficCom Australia
    Back-office services and systems: Roads and Maritime Services

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

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

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.

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.