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Latest news See all
Changed traffic conditions May Street St Peters
Changed traffic conditions on Campbell Street and Princes Highway St Peters
WestConnex powers Sydney's employment potential from the ground up
School holiday fun as western Sydney park is transformed into interactive art gallery
NSW Government launches SMC transaction
WestConnex New M5 community site tours
New M4 ramp takes shape over Concord Road
M4 night closures at Concord
What's happening now
Widening the existing M4 Motorway from Parramatta to Homebush from three to four lanes in each direction. Today, more than 100,000 vehicles a day use the M4. It is a notorious...
View and comment on proposed open space concepts along the New M4
The Legacy Project aims to provide safe, vibrant and high quality open spaces for communities impacted by the New M4 by delivering 5.76 hectares of additional land for...
New M4 tolls
Stretching 7.5km between Parramatta and Homebush and having increased from six to eight lanes, the New M4 is an even faster way to bypass 28 sets of traffic lights on...
New M5 Air Quality Community Consultative Committee
Sydney Motorway Corporation (SMC) established the New M5 Air Quality Community Consultative Committee (AQCCC) in September 2017 to provide input and advice on the location of...
M4-M5 Link Concept Design
Consultation on the M4-M5 Link Concept Design ran from 12 May to the 4 August 2017. This non-statutory 12-week consultation period sought to provide the community and other...
Fighting fit at any age
In January 2017, Sydney Motorway Corporation provided a grant to Concord Senior Citizens Club to purchase four new playing tables for its table tennis group, so the...
Helping pre-schoolers have the best possible start to school
Sydney Motorway Corporation will help 20 pre-schoolers with hearing loss within the WestConnex corridor to go through The Shepherd Centre’s Ready Set Go school readiness...
Seeking expressions of interest for the M4 East Air Quality Community Consultative Committee
Sydney Motorway Corporation (SMC) is in the process of establishing an Air Quality Community Consultative Committee (AQCCC) to provide input and advice on the location of air...
Widening the existing M4 Motorway from Parramatta to Homebush...
Extending the M4 Motorway in tunnels between Homebush and...
King Georges Road Interchange Upgrade
Upgrade of the King Georges Road Interchange between the M5...
Photos & Videos
WestConnex drives Western Sydney jobs
New M5: Super T girder lift
New M4: Concord Road girder lift
WestConnex - faster, safer, more reliable
M4-M5 Link: Rozelle Interchange and Iron Cove Link
M4-M5 Link mainline tunnels animation
First tunnel breakthrough - SMC exclusive
Community Connections Program
Engineers Australia Experience It! conference supported by WestConnex
New M4 tunnel breakthrough
WestConnex tunnelling update
Ramsay Street cut and cover
Keeping our city moving
Tunnelling begins at Bexley North
New green space in St Peters
Cleaning up the Alexandria landfill site
New inner west park and tunnel link
Upgrade at King Georges Road interchange takes shape
New life for historic sandstone
The Hulk finishes M4 Widening work
Angelo from Granville
M4 Widening equipment goes west
Tunnelling begins in Homebush
FAQs See all
For each WestConnex project, a series of documents including details of the measures to appropriately manage and reduce the impact of the project on local communities. These include:
- The Environmental Impact Statement (EIS) – the EIS explores the potential environmental impact and outlines measures to manage and reduce this impact based on best practice and expert advice.
- The Submissions Report – this responds to all feedback received on the EIS during exhibition. It provides additional mitigation measures needed in response to new information, additional assessment or community feedback.
- The Conditions of Approval – in approving each project, the NSW Minister for Planning issues a range of conditions that must be adhered to during and after construction, to ensure impact of the project is mitigated.
- The Construction Environmental Management Plan and sub plans – before we start major work, these are prepared to provide a detailed approach to the management of environmental issues. The Department of Planning and Environment must approve these before major construction work can start. They build on the mitigation and management measures established in the EIS, the Submissions Report and Conditions of Approval.
We always notify local communities before we start a new section of work and before we do any out-of-hours work.
For surface road sections of the motorway, including the widened M4, the speed limit will generally be 90km/h. In tunnels, the speed limit will be 80km/h, the same as for other tunnels in Sydney. A small section connecting to Sydney Airport may have a lower speed limit.
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.
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