The $112.5 million Murdoc Drive Connection project is now fully open to traffic in Perth's southern suburbs.
Infrastructure Victoria has released research showing that fixing transport congestion is key to reducing growing congestion on the roads.
The Pacific Highway between Glenugie and Maclean will be renamed 'Big River Way,' once the new bypass south of Grafton, Ulmarra and Tyndale opens later this year.
The Woolgoolga to Ballina leg of the Pacific Highway upgrade is now 85 per cent complete with the project finish projected for the end of this year.
Construction of the first stage of the Monaro Highway upgrades in Canberra is set to begin this month.