Lt Col Natthawuth Summat of Prasart police attended the Tambon Kang An's market on the Surin-Prasart Road, where 12 cars and one motorcycle were damaged.
The incident on the first day of the seven-day New Year holiday caused congestion on Highway 24 between Ubon Ratchathani and the Cambodia border at Chong Chom.
The police said the accident was caused by a pickup driven by a 24-year-old soldier, Sergeant Wanphot Cheepho, who was returning from Muang Surin and heading to a border base in Phanom Dongrak district.
It was reported that Wanphot fell asleep and crashed into the parked cars and a motorcycle in front of the market.