Brisbane Lord Mayor Graham Quirk has faced questions from Labor councillors over the choice of a French sports consultancy by the Council of Mayors for South-East Queensland to compile a $62 billion infrastructure plan.

The People Mass Movement study was released in January by SEQ Mayors, of which Cr Quirk is the chairman, and detailed a 20-year infrastructure plan to prevent gridlock and link south-east Queensland into a comprehensive network of rail and road, and to prepare for a future Olympics bid.

Asked by Labor opposition leader Peter Cumming why a sports events company had undertaken a major public transport study, Cr Quirk said specialist company Event Knowledge Services are experts in their field, and he had “absolute confidence” in the report.