From the linked article,
"The driver, Mr. Chanachon Khaokhuntod, 30, told The Pattaya News team, “I had lost control at a curve because the road was under construction, covered in gravel and sand. The vehicle slipped on the roadwork and overturned. This construction was not clearly marked and led to the accident, which was not my fault but due to the poorly marked construction area.”
Or in shorter terms, "I was driving too fast for the conditions."