A 15-year-old girl was badly hurt when a car she was a passenger in left the road and struck a tree in Rushton Road near Desborough on Thursday evening (April 17).
Police are appealing for witnesses who saw the incident, which happened at about 6.10pm.
The collision happened in Rushton Road, between Desborough and Rushton and led to the car rolling over.
So far in 2014, road traffic collisions have made up for around 44% of DLRAA’s rescue missions.
A silver Vauxhall Vectra, driven by a 41-year-old man from Kettering, was travelling towards Rushton when it left the road and hit a tree.
The 15-year-old girl was taken by air ambulance to University Hospital Coventry with serious injuries.
A spokesman for Derbyshire, Leicestershire and Rutland Air Ambulance, which was sent to the scene, said: “Once freed, the patient was stabilised and treated at the scene before being airlifted to University Hospitals Coventry and Warwickshire for further treatment.
“Her current condition is unknown.
“The driver was treated at the scene by the East Midlands Ambulance Service crew.”
The driver and the second passenger, a 13-year-old girl, were also taken to hospital with minor injuries.
Witnesses to this incident are asked to contact Northamptonshire Police on 101 or call the Drivewatch Hotline on 0800 174615.