The Western Australian Government has announced the successful company to deliver engineering and planning for the rail line, part of the METRONET project.
Funding from the Queensland Government is going towards replacing 18 timber rail bridges between Townsville and Cairns.
Global energy and infrastructure business Acciona Energy has been selected to develop, finance, construct and operate a $500 million solar farm at Aldoga in Queensland.
Victoria will undertake one of the largest archaeological digs as part of its Melbourne Metro Tunnel project.
The Federal Government has announced it is committing $5 billion to build a Melbourne Airport Rail Link.