Police said the accident happened at 5.30am on the inbound Rama II Road in Samut Sakhon's Muang district.
The lorry driver Suchart Prachupsuk, 63, was killed behind the wheel.
Police found a giant emergency wreck buoy in the middle of the road near the crash scene and a six-wheeled truck with another buoy in its trailer parked nearby.
The other truck driver, Somsak Poldongnok, 30, told police that he had been transporting two buoys from Phuket to Sattahib when his vehicle hit a hole in the middle of the road, causing the restraints on one of the buoys to fail.