Specialist soldiers with experience in war zones will help ward off the risk of a terrorist attack during the G20 summit in Brisbane.
The world's most powerful leaders are now less than two weeks away from arriving in the city, amid the largest peacetime security operation Australia has seen.
Authorities on Monday detailed a plan to guard against bombings and other potential threats, using a network of checkpoints that will search every vehicle heading into the G20's restricted zones.
Some will be staffed by soldiers, others by police, backed by dogs trained to sniff out explosives and robots designed to handle anything that's found.
Australian Defence Force Major-General Stuart Smith said the checkpoints would leave nothing to chance, with five or six soldiers or police involved in searching every vehicle bound for restricted zones.
That includes motorcades carrying the likes of US President Barack Obama and Russian President Vladimir Putin.
"We've got soldiers here that have got experience in Afghanistan, in doing high profile search techniques," the commander for the ADF's G20 support team told reporters on Monday.
Maj-Gen Smith warned Brisbane residents to expected ramped up training exercises as the November 15/16 summit approaches but was tight lipped about a counter-terrorism exercise in the CBD on Sunday night.
The operation involved heavily armed soldiers in body armour swarming around the Eagle Street precinct.
With just 11 days to go until world leaders begin arriving, police know of 26 planned, peaceful protests, and are monitoring groups that might spawn destructive street violence.
Two people have been formally banned from entering the Brisbane CBD under powers aimed at keeping known trouble makers away, with a third being assessed.
Despite the vast security operation, Brisbane residents have been urged to come into the CBD during the summit, to help the city make the most of an international marketing opportunity.
"We don't want a ghost town. It can't be," Brisbane's Lord Mayor Graham Quirk said on Monday.
He said there'd be 3000 journalists in Brisbane covering the summit, and they needed to go home with good news stories about what the city could offer.
WHAT THE G20 WILL MEAN FOR BRISBANE
* More than 30 world leaders to attend, including Obama and Putin
* 4000 delegates and about 3000 reporters
* Reduced public transport services
* Road closures in some parts
* Many of the security restrictions to apply from Monday, November 10
* 1100 free car parking spots to attract people to CBD
* 6000 police, including 1500 from interstate and New Zealand, patrolling
* Restricted public access areas, including parts of South Bank where summit will be held
* Vehicles bound for restricted areas to be checked at security points
* Road access to and from airport affected intermittently as leaders arrive and depart
* Public holiday in Brisbane local government area on Friday, Nov 14, but retailers and restaurants free to trade
* More than 20 protests planned, but police expect more
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