A council spokesman said the project would improve safety for drivers, cyclists and pedestrians, improve traffic flow, reduce delays during peak times and cater for future growth.
"To accommodate this vital upgrade, some land resumptions are required to allow space for the additional traffic lanes, infrastructure upgrades, pedestrian pathways and landscaping," the spokesman said.
The council has acquired 21 properties in part or full at a cost of $16,841,750 for the project.
A drone image shows work done late last year that affected residents of the backstreets in Mooloolaba as part of the Mooloolaba Transport Corridor upgrade project. Picture: Patrick Woods
Individual agreements with landowners are confidential but the spokesman said property purchases were informed by independent market valuations.