Songkran road accidents killed 335 people and injured 3,506 others from April 11-16, with the highest number of accidents and injuries in Chiang Mai province and the biggest death toll in Nakhon Ratchasima.
The Road Safety Directing Centre of the Interior Ministry reported the figures on Monday.
The northern province of Chiang Mai showed the highest number of accidents at 153 and the biggest number of injured people at 160. The provincial highest death toll was in the Northeast's Nakhon Ratchima, at 17.
Seven provinces reported no death tolls: Amnat Charoen, Krabi, Mae Hong Son, Narathiwat, Phangnga, Phuket and Samut Songkhram. Chaiyaphum was free of traffic injuries.
On April 16 alone, 403 traffic accidents killed 44 and injured 427 people. The most common cause of the accidents on Sunday was drink-driving (38%), followed by speeding.
Eighty-two percent of the accidents involved motorcycles and 8% pickup trucks.