Freitas also said in a radio interview that the right-wing government of President Jair Bolsonaro, inaugurated on Jan. 1, is considering awarding licenses for private-sector firms to build and operate 5,600 kilometres of new toll roads and bid again on 4,000 kilometres of existing toll roads.

"We need to identify all the stretches of road which can be commercially run and transfer them to private sector via public-private partnerships and concessions," Freitas said.

His remarks reflect Bolsonaro's plans to attract private investment in the country's relatively underbuilt road and rail networks, while shrinking the Brazilian state to close a huge fiscal deficit.

"Obviously we are not only talking about privatisations, but also about the liquidation of companies which are inviable," Freitas said. "The plan is to free up the budget to invest in other priority areas."

(Reporting by Pedro Fonseca; Writing by Ana Mano; Editing by Bernadette Baum)