A police spokesman said officers responded to a single vehicle crash on North Rd at 2.40pm today.
The car crashed in North Rd and rolled over onto its roof.
Fire and Emergency New Zealand and Hato Hone St John were in attendance.
A St John spokeswoman said two ambulances and a rapid response unit attended the scene.
One person was treated and transported in a moderate condition to Dunedin Hospital.
Traffic was being diverted back the way it came but the road has since reopened.