Brisbane City Council's proposed metro system will eventually be extended to Chermside, Carindale and Springwood, deputy mayor Adrian Schrinner said, as more details of the revised project were revealed.

According to the council's plans, the new Chermside line would feed into the Royal Brisbane and Women's Hospital station, while the Carindale line would feed into the Buranda metro station.

Artist's impression of a Brisbane Metro bi-articulated bus crossing the Victoria Bridge. Credit:BCC

The Springwood line would be an extension of the already announced Eight Mile Plains line, along the South East Busway.

The revelation came weeks before the business case for Brisbane Metro 1 (between Eight Mile Plains and Roma Street) and 2 (between the University of Queensland and the RBWH) was due to be released.