Hundreds of people have flocked to the testing centre, which is on State Highway1 running north, and queues of vehicles trying to get into the drive-through lane have caused major disruption.
"WellSouth is working with Waka Kotahi and the Dunedin City Council to reduce any congestion that has occurred on occasion during peak traffic hours," WellSouth chief executive Andrew Swanson-Dobbs said.
"There will also be increased police monitoring around the Cumberland-Frederick, Cumberland-Albany and Cumberland-St Andrew intersections, particularly at peak traffic times."
WKNZTA had set up a sign to warn motorists of the testing site, and extra signs would be installed today to remind people to keep the Cumberland and Frederick St intersection clear.
Earlier this week the demand for testing meant rather than time-consuming PCR tests, more people were being given rapid antigen tests (Rats) to take away, something Mr Swanson-Dobbs said should also reduce traffic congestion.
Some members of the public have questioned the wisdom of a testing centre being set up so close to a major thoroughfare.
Mr Swanson-Dobbs said the Malcolm St site was chosen due to proximity to University of Otago and Otago Polytechnic campuses and to Dunedin Hospital.
"Other requirements included being able to safely provide drive-through and walk-in access to the site without an appointment," he said.
"There were very limited options meeting these criteria."
WellSouth was now considering setting up a Rat collection site elsewhere to further reduce demand on the testing centres.
