M4 Widening

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M4 Widening

(Parramatta to Homebush)

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 and frustrating bottleneck, with congestion for up to 13 hours a day just ask any motorist who sits in bumper-to-bumper traffic every day.

WestConnex M4 Widening involves building an additional lane in each direction on the M4 Motorway between Parramatta and Homebush. The project is about 7.5km long.

Environment and planning 

The M4 East received planning approval in December 2014 and work started in March 2015.  


Project history

  • February 2017: New viaduct open to traffic, with work on resurfacing old westbound carriageway underway.
  • January 2017: New interchange at Homebush Bay Drive opened to traffic. Cars travelling south on Homebush Bay Drive can access M4 Motorway westbound via a 'G-loop', removing two sets of traffic lights.
  • March 2015: Construction work on the M4 Widening started.
  • December 2014: The contract to build the M4 Widening was awarded.
  • December 2014: The project was approved by the Department of Planning and Environment subject to a number of conditions.
  • October 2014: 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.
  • August to September 2014: The M4 Widening Environmental Impact Statement was exhibited for community comment and a community update and environmental overview were prepared.
  • March 2014: A shortlisted of contractors to build the M4 Widening was announced. 
  • November 2013: Expressions of interest to construct the M4 Widening were issued.
  • October to November 2013: Community consultation was carried out on the motorway concept design and the feedback received is outlined in the M4 Widening Community Issues Report. 
  • September 2013: The planning application for the M4 Widening was lodged with the Department of Planning and Environment.

Project stats

Project value^$497 million^
Current statusIn construction 
Construction startMarch 2015
Open to traffic2017
Current traffic projections*163,800* vehicles per average weekday by 2031

* Based on WestConnex Road Traffic Model V2.1, WestConnex Updated Strategic Business Case, November 2015
^ WestConnex Updated Strategic Business Case, November 2015

Industry partners

    Design and construct contract: CPB Contractors and Rizzani De Eccher Joint Venture
    Operations and maintenance contract: Maintenance during construction: CPB Contractors and Rizzani De Eccher Joint Venture
    Operations and maintenance after project completion: 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

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: we are widening the M4 Motorway from 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 number of lanes for this project is still being determined as part of our early design work.

WestConnex will have a distance-based tolling system, similar to the existing M7 Motorway. Motorists will pay only for the sections of the motorway they use and a maximum cap applies.

Tolls will be introduced as each section of WestConnex opens to traffic. The first tolls will start on the M4 in 2017, when the M4 Widening project is opened to traffic.

Cars will pay one third of the heavy truck toll, reflecting the greater wear and tear trucks have on the motorway (an approach that is consistent with other Sydney motorways).

For the current toll estimates, see Using WestConnex.

Tolls will be introduced on the M4 between Church Street, Parramatta and Homebush Bay Drive, Homebush when this section opens to traffic in 2017. 

Tolls will apply to new sections of WestConnex, including the M4 East, New M5 and M4–M5 Link once these new motorways open to traffic between 2019 and 2023. 

We are also carrying out minor upgrades to the M5 East and a toll will also be introduced on this motorway to account for the massive improvements in travel time and reliability motorists will experience as a result of WestConnex. 

To maintain access to Sydney Airport’s International Terminal, trips using Marsh Street ramps will remain toll free.