On being notified of the accident, Samre Metropolitan Police officers and a medical team from King Chulalongkorn Memorial Hospital rushed to the spot to find the body of the young man next to his mangled motorbike with his limbs broken.
A security guard who witnessed the accident said the man was riding at high speed when he hit a road barrier.
The body was sent to King Chulalongkorn Memorial Hospital for an autopsy and will be returned later to his family for a funeral.