Momentum is building for public transport to be free in Brisbane throughout the three days of the G20 world leaders summit next month.

Commuter advocacy group Rail Back on Track has called for free public transport in the city throughout the three days, reasoning that Brisbane residents should be afforded the same opportunity as the 7000 summit delegates, who will all be given Go Cards for travel through the period.

The state government has no plans to offer free public transport during the G20. Credit:Harrison Saragossi

Brisbane City Council's Labor Opposition has also lodged a notice of motion for Tuesday's council meeting, urging the LNP administration to support Rail Back on Track's push and lobby the Queensland Government for free travel throughout the period.

Rail Back on Track's spokesman Robert Dow said making public transport free would be a gesture of goodwill to commuters, in compensation for significant disruptions across the network.