A man remains in a critical condition on Friday after the vehicle he was driving crashed into a wall and down an embankment.
The single-vehicle collision occured on the B6270 between Low Row and Gunnerside in Swaledale.
It happened at around 11am on Thursday and involved a Ford Mondeo which ended up about 50 metres down an embankment in a field.
This story continues after the adverts:
Firefighters from Hawes and Reeth attended the scene.
The passenger had managed to escape on his own but the driver was trapped in the vehicle.
Crews used hydraulic cutting equipment to remove the steering wheel off the car and rescue the man, who had serious head injuries.
The driver, who is aged in his 30s and from the Darlingto area, was then anaesthetised by medics from the Great North Air Ambulance before he was airlifted to the James Cook University Hospital in Middlesbrough.
It is suspected he may have taken ill at the wheel prior to the collision.
The passenger, who is aged 17 and also from the Darlington area, was taken to Darlington Memorial Hospital by land ambulance with suspected rib injuries.
The road between Low Row and Gunnerside was closed for approximately five hours to allow emergency services to attend to the casualties and while investigators examined the scene of the collision.
Anyone who witnessed the collision is asked to contact North Yorkshire Police on 101, select option 2 and ask for Richmond Roads Policing Group. Or email firstname.lastname@example.org
Please quote reference number 12170231022 when passing on information.
Another accident occurred near Low Row later in the afternoon.
A van collided with a wall and came to stop upside down.
Firefighters from Reeth arrived to find the driver of the van was out and unharmed.
The crew made the scene safe and cleared the road and left the incident in the hands of the paramedics who had arrived.