The table below shows the Stage 3 proposals that Infrastructure Australia has previously evaluated.
For each proposal, we publish a summary of our evaluation, which you can access in the table below. This outlines our assessment of the strategic fit of the proposal, the costs and benefits the proposal offers for Australians, and the deliverability of the proposal.
To see the proposals we have positively evaluated as nationally significant priorities for Australia, explore the Infrastructure Priority List.
A number of business cases evaluated by Infrastructure Australia have been publicly released, view all available business cases.
The business case is for a new 16-kilometre motorway to connect the Western Sydney International Airport at Badgerys Creek with Sydney’s motorway network.
The business case is for upgrading existing signalling and control systems on the Perth rail network to an integrated high-capacity signalling system, enabling more trains and improved reliability.
The business case is for the construction of a new 21km rail line between Bayswater and Ellenbrook, to provide rapid transit access for communities, workers and tourists in this area.
The proposal comprises the duplication of the remaining single-track section of the Port Botany Rail Line, and delivery of a new passing loop on the Southern Sydney Freight Line, to increase capacity, efficiency and reliability.