Police are investigating the death of an "unidentified" man, after his body was discovered on the coastal side of the A548 road yesterday evening.
The incident is currently being treated as an unexplained death.
Officers are appealing for dashcam footage of the area between Prestatyn and Gronant, taken within the last ten days.
The road was closed off at around 3.30pm on Friday, and remained shut this morning.
Forensic officers, underwater search teams, and unformed officers were all dispatched to the area and a white tent was set up on the road while investigations were carried out.
North Wales Fire and Rescue Service and Wales Ambulance Service were also sent to the incident.
Drivers are being advised to avoid the area and bus services have been diverted as a result of the closure.