US officials requested that a roundabout outside the University of Queensland be demolished so President Barack Obama's G20 motorcade would not need to slow down, according to reports.

The Australian reported on Thursday that the Secret Service request was turned down by Queensland authorities.

The Secret Service requested a Brisbane roundabout be demolished for US President Barack Obama's G20 motorcade, according to a report. Credit:Jacquelyn Martin

A spokeswoman for Transport Minister Scott Emerson said she was not aware of any request being made to Transport and Main Roads.