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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 Confidential submissions (including author name) will not be published. Private addresses and contact details will not be published or disclosed to any third parties unless required by law.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.

Mount Ousley Interchange
This project involves the construction of a new interchange between the M1 Princes Motorway and Mount Ousley Road. The interchange will replace the existing intersection, which is a significant pinch point of the Motorway network, and currently experiences long queues and delays during peak periods. As the primary access point to Wollongong and Port Kembla, issues at this intersection also create significant flow-on effects across the wider transport network. This project will improve travel times, as well as access to the Wollongong central business district and the University of Wollongong. It will ensure safer access to and from the Motorway to Mount Ousley Road, and improve safety by separating cars and heavy vehicles travelling down Mount Ousley.
Nowra Bridge
The project involves the construction of a new northbound bridge, repurposing of the existing northbound bridge to take southbound traffic, and rehabilitating and repurposing the historic truss bridge for active travel use.
Hume Highway Corridor Assessment and Strategy - Planning
The project will deliver a corridor assessment and management strategy for the full length of the Hume Highway from Marulan to the Victoria Border.
Mount Ousley Safety and Reliability (MOSAR) - Planning
The project will undertake development activities and the preparation of a Final Business Case to improve the safety and resilience of the M1 Princes Motorway at Mount Ousley.
Canberra Light Rail - Stage 2B Planning
This project will deliver the design and approvals for Canberra Light Rail Stage 2B. Canberra Light Rail Stage 2B will extend the light rail network in Canberra from Commonwealth Park to Woden.
Plummers Lane at Summer Island - 053170-14NSW-RTR
Narrow sealed pavement, broken edges, pavement and subgrade failures creating unsafe road conditionsRemove and replace weak subgrade and failed pavements, widen to create sealed shoulders, stabilise and bitumen sealTotal cost of proposed project is $600,460
Gungahlin District Road Improvements - Planning
This project will deliver early planning for safety and capacity upgrades for Gungahlin Drive.
Belconnen Transitway - Planning
This Project will deliver a feasibility study to investigate options for upgrading the existing bus corridor between Belconnen and Canberra City regions.
METRONET: Thornlie-Cockburn Link
The METRONET: Thornlie-Cockburn Link project is a 17.5km link connecting the existing Thornlie Rail Line to Cockburn Central Station on the Mandurah Line. The project will provide two new stations and park and ride facilities at Nicholson Road and Ranford Road.
Yagaburne-Boondandilla Road (Rural Road) - 053171-14QLD-RTR
Lack of gravel depth resulting in roughness and excess dust leading to reduced driver safetyOverlay 100-150mm of gravel, water and compact including associated drainage.

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