The arrival of the world leaders throughout Friday is expected to cause traffic disruptions, however the motorcade routes will only be revealed shortly before the roads are closed.
Many of the G20 leaders will jet in throughout the day, including the presidents of China, Indonesia, India and South Korea, the prime ministers of the UK, Canada and Japan, and German Chancellor Angela Merkel.
But it will be the arrival of Russian President Vladimir Putin that is bound to attract most attention. Australian Federation of Ukrainian Organisations president Stefan Romaniw has called on other G20 leaders to show their disapproval of Russia´s actions by imposing sanctions on the country and stripping it of the 2018 FIFA World Cup.
As many as 4000 delegates and 3000 reporters from around the globe will attend the gathering, which is costing half a billion dollars.
The last of the leaders arrive on Saturday, with US President Barack Obama and his huge entourage landing early in the morning. The president will deliver a speech at the University of Queensland before joining other G20 leaders.
The G20, the major economic conference will focus on economic issues and not climate change. Climate change did not figure in the early drafts of the communique to be issued at the end of the summit but OECD secretary-general Angel Gurria said it could be added to the talks in the wake of the China-US deal.
The G20 main focus this weekend is to secure a formal agreement to lift global economic growth by two percentage points over five years.
Support for this is already strong among leaders including US President Barack Obama, Chinese President Xi Jinping, German Chancellor Angela Merkel, Japanese Prime Minister Shinzo Abe, Mr Cameron and others.
The goal requires the leaders to endorse more than 900 individual measures, ranging from infrastructure investment to competition reforms, which will be measured over time by the International Monetary Fund and the OECD.