Police Scotland is appealing for information following multiple crashes on the South Deeside Road B9077 between Leggart Terrace and the A957 Slug Road on Monday, 9 December, 2019.
Emergency services were made aware of multiple incidents involving motorists colliding with boulders and rubble that appears to have fallen from a vehicle travelling along the road around 4.00pm.
Constable Simon Anderson, of Banchory High Street Police Station, said: "We would like to thank road users for their patience whilst the road was closed so it could be cleared and further incidents avoided.
"Enquiries are continuing and I would ask anyone with information or dash cam footage who has not yet come forward to get in touch. We are particularly keen to speak to anyone who has seen a vehicle in the vicinity, carrying such a load at the time."
Anyone with information in relation to this incident is asked to contact Police Scotland on 101 quoting the reference number 2546 of 9 December, 2019.
Call 101 for non-emergencies and general policing matters, in an emergency call 999. If you have information about a crime you can also contact Crimestoppers anonymously on 0800 555 111.
If your email enquiry is relating to the UK or Scottish Governments coronavirus guidance please refer to gov.scot/coronavirus. If it is a medical enquiry regarding coronavirus please refer to nhsinform.scot/coronavirus.