Lord Mayor Graham Quirk has faced questions from Labor councillors over the choice of French sports consultancy firm to compile a $62 billion infrastructure plan for Brisbane.

The People Mass Moving study, released in January, details a 20 year plan to prevent gridlock and link SEQ into a comprehensive rail and road network, but questions have been asked about why a sports event company has undertaken a major public transport study.

Councillor Quirk says the study is a collection of federal, state and local of reports, rather than a completely new one, compiled by suitably qualified people, and any attempt to remove its legitimacy would be a bad move.