Design released for new M4 East tunnels

Media Release


04 June 2015

Joint release with:

Duncan Gay

NSW Minister for Roads, Maritime and Freight
Leader of the Government Legislative Council

The Australian and NSW governments are wasting no time in delivering a world class motorway for Sydney, today announcing the preferred design for the M4 East tunnels to run under Parramatta Road.

Federal Assistant Minister for Infrastructure Jamie Briggs and NSW Minister for Roads, Maritime and Freight Duncan Gay released plans for the first underground construction stage of WestConnex, which will help Rebuild NSW.

Motorists driving from Western Sydney will have the option to enter a tunnel east of Homebush Bay Drive emerging near the Bunnings Warehouse on Parramatta Road or on Wattle Street at Haberfield.

Removing thousands of cars and 3,000 trucks off Parramatta Road each day from Homebush to Wattle Street will allow the opportunity to breathe new life into this decaying road corridor.

The design also includes entry and exit points for the twin tunnels at Concord Road, North Strathfield, allowing local traffic to access the motorway.

Mr Briggs said Sydney needs and deserves a world class motorway to help unclog crippling traffic congestion and support jobs and economic growth.

“Traffic congestion is currently costing Sydney $5 billion each year in time delays and lost productivity, meaning people are spending less time being productive at work or at home with their families,” Mr Briggs said.

“If we do nothing, this cost will grow to $8 billion each year by 2020—a totally unacceptable situation for Australia's largest city.

“Widening and extending the M4 and M5 and joining them together to form WestConnex will also generate 10,000 new jobs during construction, many of them from Western Sydney.

“WestConnex is a key part of the Australian Government's biggest ever infrastructure investment programme in our nation's history to support thousands of new jobs and reduce congestion on major transport corridors throughout New South Wales.”

Mr Gay said with an extra 1.6 million people to call Sydney home within 20 years, WestConnex is desperately needed so the city doesn't come to a grinding halt.

“WestConnex will help provide relief for hundreds of thousands of motorists stuck in gridlock on the M4 and M5 each day,” Mr Gay said.

“We are investing historic levels of funding to build public transport like the $8.3 billion North West Rail Link, but upgrading Sydney's existing motorway network is vital.

“Each day thousands of Sydneysiders need to drive to rail and bus stations, ferry wharves, business parks, hospitals, schools, shopping centres and sporting grounds.”

Where possible, WestConnex is being built underground or in reserved road corridors to minimise property acquisitions.

After an intensive five-month tender assessment process, the consortium chosen to build the M4 East twin tunnels and related connections includes Leighton Contractors, Samsung C&T and John Holland.

Widening of the M4 between Parramatta and Homebush is currently underway, with construction on the new M4 East expected to commence mid next year. The preferred M4 East design is subject to planning approval with the project due for completion by 2019.

The community can drop into the WestConnex information kiosk at Westfield Burwood to learn more.

All details are available online at

Key design features of the new M4 East and related connections:

  • Twin tunnels with three lanes in each direction, spanning 5.5 kilometres in length at a height of 5.3 metres.
  • Motorists can enter and exit the M4 East tunnels at:
    • The M4 Motorway at Homebush
    • Concord Road at North Strathfield
    • Parramatta Road at Haberfield (near Bunnings Warehouse)
    • City West Link at Haberfield
  • Significant surface road improvements for local residents at Patterson Street, Concord and Wattle Street, Haberfield, including a new right turn from Wattle Street into Ramsay Street.
  • Future proofing with the provision for Stage 3 (Haberfield to St Peters) ramps on Wattle Street, reducing additional long term construction impacts.
  • No impact on the heritage listed Yasmar or Ashfield Park.