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Infrastructure Investment Program

The Australian Government is committed to a 10-year, over $120 billion infrastructure investment pipeline, ensuring a rolling program of sustainable land transport infrastructure projects.

The Government is working in partnership with states and territories to deliver a credible and sustainable pipeline of projects which support a range of economic and social objectives, including productivity and resilience, sustainability and liveability.

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We acknowledge the traditional owners of the Country throughout Australia and their continuing connection to land, sea and community. We pay our respect to them and their cultures and to the Elders past and present.

©2026 Commonwealth of Australia

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Submissions or registrations of interest to be kept informed about the progress of this work, can be made directly via email to costestimation@infrastructure.gov.au or by using the form below.

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Australian Privacy Principle 5 Notice

Your submission, including any personal information supplied, is being collected by the department for the purpose of seeking public and industry comment on the approach and content of its proposed cost estimation guidance, in accordance with the Privacy Act 1988 (the Privacy Act).

Your personal information will be stored securely by the department. It may be used by the department to make further contact with you about the consultation process. Your personal information will not be disclosed to any other third parties, except in the circumstances outlined below.

Submissions, in part or full, including the name of the author may be published on the department's website or in the Government's response, unless the submission is confidential. Confidential submissions (including author name) will not be published. Private addresses and contact details will not be published or disclosed to any third parties unless required by law.

Submissions will only be treated as confidential if they are expressly stated to be confidential. Automatically generated confidentiality statements or disclaimers appended to an email do not suffice for this purpose. If you wish you make a confidential submission, you should indicate this by ensuring your submission is marked confidential.

Confidential submissions will be kept securely and will only be disclosed in the following circumstances:

  • in response to a request by a Commonwealth Minister;
  • where required by a House or a Committee of the Parliament of the Commonwealth of Australia; or where required by law.

The department may also disclose confidential submissions within the Commonwealth of Australia, including with other Commonwealth agencies, where necessary in the public interest.

Please note that in order to protect the personal privacy of individuals in accordance with the Privacy Act any submissions containing sensitive information, personal information or information which may reasonably be used to identify a person or group of people may not be published, even if not marked as confidential.

The department's privacy policy contains information regarding complaint handling processes and how to access and/or seek correction of personal information held by the department. The Privacy Officer can be contacted on (02) 6274 6495.

Zero Emission Buses Tranche 1 Infrastructure - Macquarie Park Depot
The project will construct a new purpose-built electric bus depot in Macquarie Park to house Zero Emission Buses.
Circular Quay Renewal Program
The project will revitalise Sydney's Circular Quay precinct, including upgrading the train station to: - enable safer and more effective crowd management; - improve pedestrian flow, safety and access; - enhance passenger amenity, including wayfinding; and - provide new facilities for transport operation staff.
Mamre Road Stage 2 Upgrade
The project will upgrade Mamre Road with four lanes between Erskine Park Road and Kerrs Road, with provision for future capacity upgrades. 
Elizabeth Drive - Priority Sections Upgrade
The project will upgrade priority sections of Elizabeth Drive to support freight and commuter traffic in Western Sydney, support the Western Sydney Airport and the Aerotropolis precinct. 
Mulgoa Road Stage 2 Upgrade
The project will upgrade Mulgoa Road to six lanes between Glenmore Parkway to Jeanette Street, Glenmore Park, including upgrades to active and public transport infrastructure. This builds on the upgrade of Mulgoa Road Stage 1 from Jeanette Street to Blaikie Road.
Richmond Road Upgrade, M7 Motorway to Townson Road
The project will upgrade a 2km stretch of the Richmond Road corridor from the M7 Motorway to Townson Road to six lanes, providing support to the Hawkesbury-Nepean valley flood evacuation route and improving access to the Marsden Park industrial precinct and housing developments.
Memorial Avenue Upgrade
The project will upgrade Memorial Avenue between Old Windsor Road and Windsor Road, Kellyville including the widening of 2.2km of road from a two-lane to four-lane divided road (with allowance for future widening to six lanes).
Western Sydney Rapid Bus Infrastructure Upgrade
The project will provide infrastructure for zero emission rapid bus services to connect the metropolitan centres of Penrith, Liverpool, Campbelltown and Blacktown to the Western Sydney International Airport and Aerotropolis.
Eastern Ring Road and Badgerys Creek Road South - Planning
The project will develop a Final Business Case to progress planning for the Eastern Ring Road and Badgerys Creek South. These two roads will deliver a priority north-south corridor for commuter, freight, public transport and active travel east of the Western Sydney International Airport.
Spring Farm Parkway Stage 2 - Planning
The project will develop a Final Business Case to link Liz Kernohan Drive at Spring Farm and Spring Farm Parkway Stage-1 at Menangle Park, to support housing development in the area.

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