The Transport Agency has spent nearly $800 million on traffic management in the past three years, according to new reports.

The Government has revealed the spend went to road cones, temporary traffic management, state highway maintenance and capital works. 

Transport Minister Simeon Brown says this is an 'exorbitant' sum and the spending needs to come down. 

"We need to see a much more efficient use of taxpayers' money when it comes to maintaining our roads and keeping road workers safe - we have to get that balance right."

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