There were 322 deaths and 3,225 injuries as a result of 2,992 road accidents across country from last Friday to Thursday - the so-called seven dangerous days of Songkran, said the state road safety agency.
Interior Minister Charupong Ruangsuwan, who chaired the Road Safety Directing Centre, said on Thursday alone there were 238 road accidents which killed 43 people and injured 299.
Speeding was the major cause of accidents (25 per cent) followed by drunk driving (21 per cent).
Most accidents involved motorcycles (80 per cent) and pickup trucks (22 per cent).
Among the injuries and deaths, 8 per cent were involved in risky behaviour such as not wearing a helmet.
Most accidents occurred on highways and village roads between noon and 4pm. Most victims were aged between 20 and 40.
The Road Safety Directing Centre set up 2,275 checkpoints nationwide and deployed 67,002 staff to examine 597,820 vehicles.
More 90,000 people were arrested or fined for violating road safety regulations.
For Thursday, Nakhon Si Thammarat, Trang, and Ratchaburi recorded the highest number of accidents (12 each) while Chiang Mai had the highest number of deaths (four) and Kanchanaburi the highest number of injuries (30).
Chiang Mai recorded the highest number of accidents since Songkran started (116) and had the highest number of injuries (144), while Nakhon Si Thammarat has the highest number of deaths (14).
The centre said five provinces recorded no deaths or injuries – Chai Nat, Phetchaburi, Angthong, Phang Nga, and Yala – while 644 districts no reported casualties.