Brisbane's bus and ferry commuters could face more timetable upheaval.

With the Brisbane City Council budget imminent, Lord Mayor Graham Quirk strongly indicated last year's public transport "optimisation" that saved ratepayers $16 million in its first six months could continue next financial year.

Lord Mayor Graham Quirk says the council will continue to review the city's public transport network. Credit:Michelle Smith

While he has previously ruled out further cuts to services, at Tuesday's council meeting he said the ongoing review of network efficiency was a priority.

"It is our task to make sure that we get Brisbane transport as efficient as it can be," he said. "It is not a case of an open cheque book and never will be.