The kingdom has some of the world's most lethal roads, with the carnage spiking over the New Year as millions of city workers return to their country homes.
Thailand's junta government has launched repeated crackdowns on drink driving since its 2014 power grab, including approving harsher penalties for offenders and forcing drivers to visit mortuaries holding the bodies of accident victims.
But the toll over the last week still soared to 478 -- up from the 380 recorded during the same period in 2016, according to the Interior Ministry's disaster prevention department.
The army said officials arrested nearly 67,000 people for drink driving and seized more than 4,000 cars between December 29 and January 4.
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The deadliest accident saw 25 people killed on Monday when a packed minivan and pickup truck collided in eastern Chonburi province.
Experts say a lack of helmet-wearing among motorcyclists is a major factor for the high death rate.
The kingdom's traffic cops are also notorious for bribe-taking and letting wealthy, well-connected drivers off the hook for offences.
"We did the best we could, we had more checkpoints, more authorities, we seized tens of thousands of vehicles, but still we had more casualties," he said.
Nevertheless he vowed to double-down on safety checks before Songkran, Thailand's traditional New Year holiday in April -- the other week the Thai press tags as the "seven dangerous days".