Commuters would travel to either Woolloongabba or Herston bus stations and swap onto the metro,which is estimated to almost halve the existing peak hour commute times.
The proposed project would remove up to 200 buses per hour in morning peak traffic across Victoria Bridge,which would become a"green bridge",with general traffic banned,shifting the 800 cars that travel along the bridge daily to the William Jolly Bridge or to the Go Between toll bridge.
The Cultural Centre Station at South Brisbane would move underground to cater to the underground subway portal that would connect King George Square busway and link with the Inner Northern busway.
Lord Mayor Graham Quirk said the metro system would ease the city's existing busway stations that were already operating at capacity and which cater for 68 per cent of all public transport users in Brisbane.
"Every day about 170,000 employees,visitors and students travel to or through the city centre,mostly by public transport and this is predicted to climb to 250,000 by 2031,"Cr Quirk said.
"Today I am announcing a vision for the next phase of infrastructure building to keep our city moving and plan for our future and keep Brisbane heading in the right direction.