The incident happened around 4pm on Saturday 23 July between Balmedie and Belhelvie at Victoria Hall and involved a silver Nissan Qashqai.
The driver of the car, a 34-year-old man, was taken to Aberdeen Royal Infirmary with serious injuries.
The road was closed and re-opened around 9.30pm. Enquiries into the circumstances remain ongoing.
Sergeant Eoin Maxwell, from the North East Road Policing Unit, said: “Our enquiries into the crash are continuing and we are appealing for anyone who witnessed it or the vehicle involved, to please come forward and speak to officers."
Anyone with information can call 101, quoting incident 2416 of Saturday, 23 July, 2022.