An Audi driver was taken to hospital after a crash at a roundabout near Kettering late last night (Thursday).
Emergency services were called to the roundabout junction where the A43 meets the A6003 after the incident at about 11.25pm.
Police said a black Audi A3 S line left the road but they do not yet know how the incident happened.
The driver, a man in his 20s from Essex, was taken to Kettering General Hospital but police say his injuries are not believed to be life-threatening or life-changing.
A police spokesman said :"2Officers would like to hear from anyone who may have witnessed the incident or who may have CCTV or dash-cam footage of the collision.
"Anyone with information is asked to call the Drivewatch Hotline on 0800 174615 or Northamptonshire Police on 101 quoting reference number 566 of 20/01/22."