The CCTV footage shows the truck releasing a large amount of concrete on a dangerous section of the busy road at 1:22pm as it climbed the hill around a tight bend.
The incident created a dangerous hazard for road users on what is one of Phuket’s most accident-prone roads.
Kathu Police tracked down the culprit through the company that owns the truck – Saengtong Transport Southern.
They have refused to disclose the driver’s name and revealed only that he is a 31-year-old man from Satun.
Police confirmed that he has been fined B10,000 in favour of Kathu Municipality who were left to clear the concrete from the road.