Keep up to date with all our news and announcements
Sign up hereLatest news See all
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
New M4 tunnel team donates $20,000
WestConnex grant scheme kicks goals for local communities
Stay connected
What's happening now
M4-M5 Link feedback report
The M4-M5 Link feedback report is available now.Sydney Motorway Corporation would again like to thank everyone who met and shared their ideas and feedback on the M4-M5 Link...
Read more
M4 Widening
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...
Read more
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...
Read more
New M4 tolls
The new M4 is open. Stretching 7.5km between Parramatta and Homebush and having increased from six to eight lanes, there's now an even faster way to bypass 28 sets of...
Read more
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...
Read more
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...
Read more
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...
Read more
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...
Read more
Photos & Videos
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.
Transferring vehicles from surface roads into free-flowing underground motorway tunnels will improve the air quality along existing surface roads where traffic is reduced.
For example, an independent air quality assessment detailed in the M4 East EIS found air quality will generally improve along the Parramatta Road corridor because of traffic shifting to WestConnex.
Motorists will have a smooth motorway to travel on, rather than being stuck in congested, stop-start traffic with traffic lights, and this will reduce emissions.
Our tunnels are also designed to reduce emissions, as they are generally flatter and less steep at the entries and exits.
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.
We speak your language
What is WestConnex? (in your language)