Thailand DMV will need to implement yearly testing both mentally and physically of retired drivers otherwise they'll be more of these types of accidents......
The truck must have been over the weight limit which not uncommon, especially when hauling asphalt.
Sounds like there needs to be a Runaway truck ramp built at the bottom of the hill.....
RIP Khun Khotchakorn. What a terrible way to die, especially after visiting numerous temples.
Always wear a seat belt, even if you're sitting in the back seat......