Car hits telegraph pole after collision on A64 near York

This was the scene on the A64 on Sunday evening.
Emergency services were called out to an accident on the road at Stockton-on-the-Forest.
Fire crews from York and Huntington stations went to the scene, alongside police and ambulance crews.

A car and a van were involved in a collision. The car left the road and hit a telegraph pole.
In a Tweet at 5.45pm, Station Manager Tony Walker of North Yorkshire Fire & Rescue Service warned motorists to expect delays in the area.
North Yorkshire Police are appealing for dashcam footage. If you can help call 101 and use the reference 12190225008.
Why is this not a dual carriageway?