Pol Lt Niyomrung Mungmuang, an investigator of Bang Kaew police station, said the accident occurred about 5pm Monday in the out-bound lanes of King Kaew road near a U-turn in front of a Siam Commercial Bank branch office in tambon Rachathewa.
Jakrapan Thobuddee, the driver of an 18-wheel truck running at a high speed, lost control of the vehicle.
The truck swirved across the road median strip into the oncoming lane and hit a motorcycle. The centrifugal force dislodged one of the two containers, weighing about 25 tonnes, which slid off and fell on to a Mercedes Benz car.
Maitree Thongtha, the motorcycle driver, was seriously injured. He was rushed to Chularat 9 Hospital where he was pronounced dead.
The Benz was damaged. The driver, Prasit Chamwat, and the passenger Wang Wanapraison, 63, were injured.