Tauranga City Council had a report predicting the $2.44 million roading changes in Greerton Village would make Cameron Rd congestion worse but "omitted" the information when it sought public feedback.
A 2017 traffic modelling report predicting the layout changes would worsen congestion on the arterial route is referenced in an independent review into why the controversial project fell below community expectations.
The changes were blamed for a business downturn and huge traffic snarls, with more than 700 people signing an opposition petition.
Consultant Max Pedersen found the project was driven by safety concerns and crashes, with little focus given to traffic impacts despite 17,000 vehicles a day using Cameron Rd.
Modelling by Enviro in 2017 found congestion would remain "poor" in parts of the village post-project, but it would probably get worse between Cornwall St and Pooles Rd.