It was reported at around 7.17am on the morning of Thursday 23 October 2014 and involves a man on a pedal cycle and a car.
The road is currently closed and is expected to remain closed for several hours.
Any witnesses to the incident are asked to call North Yorkshire Police on 101, and pass information to the Force Control Room.
Please quote incident number 51 of 23 October.
There we will update you when we are able on the cyclist’s injuries.