A 55-year-old man suffered life-threatening injuries after being involved in a head-on road traffic collision on the A361 at Williamscot, near Banbury about 10.50am yesterday (Monday).
The man was driving a silver Vauxhall Zafira travelling towards Daventry, near the turn for Chacombe, when it crossed the road and was in collision with a black Nissan Navara pulling a trailer travelling in the opposite direction.
He suffered head and chest injuries and was taken to University Hospital Coventry by Warwhickshire and Northamptonshire Air Ambulance.
One person in the other vehicle was taken to hospital and one had a routine check-up.
An enhanced rescue vehicle and a fire engine from Banbury attended as well as one from Brackley.
Because the Vauxhall was on the edge of a ditch, firefighters used a winch from a barrier to stabilise it and preventing it from sliding further down the ditch.
There was a large quantity of engine oil on the road which was dealt with using environment agency equipment.
Police would like to speak to anyone who may have witnessed the collision, or anyone who may have seen the Zafira on the A361 prior to the collision.
Witnesses or anyone with information is asked to contact the Drivewatch Hotline on 0800 174615.