The NZ Transport agency spent almost $11 million on Wellington's $90 million Basin Reserve flyover before the project was shelved earlier this year.
An independent board of inquiry appointed to decide the fate of the flyover proposal declined the NZTA's applications for resource consent for the construction, operation and maintenance of State Highway 1 in Wellington between Paterson Street and Buckle Street/Taranaki Street in July in a majority three to one decision.
Among its reasons, the board said the agency had not given enough consideration to alternative options.
Figures now released to Radio New Zealand under the Official Information Act showed the NZTA spent $10.9 million on the project before it was shelved.
The figure included $3.4 million on Resource Management Act submissions, $2.3 million on legal fees and $2.8 million on staff attending the Board of Inquiry and 35 experts used by the NZTA to press its case.