A total of 418 people were killed and 3,897 others injured in 3,724 road accidents during the seven dangerous day of Songkran period from April 11-17, according to the Road Safety Centre.
Drunk driving was the main cause of fatal accidents or 40.28% while most accidents, or almost 80%, involved motorcycle.
Nakhon Ratchasima is the province with highest death toll of 20 persons, followed by Phetchabun (13), Chon Buri and Sakon Nakhon (12 each).
Chiang Mai came with the highest road accidents of 133 cases, followed by Nakhon Si Thammarat (120) and Phitsanulok (106).
This year's figures surpassed those of last year when 390 people died and 3,808 injured in road accidents during the seven-day road safety campaign.
Meanwhile, Songkran revellers continued to return to Bangkok Wednesday (April 18) after the Songkran holidays ended on Monday.
The State Railway of Thailand reported on Wednesday (April 18) that more than 729,000 passengers used train services betweenn April 11-17.
Heavy traffic were reported Friendship highway, particularly on the slope section passing the Lam Takong dam in Nakhon Ratchasima province.
Another critical road is Highway No. 24, or Chok Chai-Det Udom road linking Nakhon Ratchasima and Buri Ram province.
Authorities said holidaymakers who decided to return to the capital after the Songkran holidays to avoid heavy traffic congestion also ended up facing massive jam on major roads leading into Bangkok.
Source: Thai Public Broadcasting Service (ThaiPBS)