In a final and scathing rebuke of the Keneally government's handling of public transport, the NSW Auditor-General says the government wasted more than $350 million on the abandoned underground Metro project.

Peter Achterstraat says in his report on transport projects: "Of the $412 million spent on the Sydney Metro, $356 million represents expenditure with no apparent benefit to the people of NSW."

NSW Premier Kristina Keneally. Credit:Wolter Peeters

His comments directly contradict the premier, Krstina Keneally, who, when she dumped the Metro in February, insisted the money had not been wasted.

She said at the time: "In fact, the work we have done on CBD Metro has been very useful and it will continue to be so."