A man died after his truck rolled over on southbound Highway 99 north of Victor Road on Wednesday morning, according to the California Highway Patrol.
The 11:15 a.m. solo vehicle accident brought traffic to a standstill for almost an hour on the highway.
The CHP could not yet release the name or age of the driver, but he is from Stockton, California Highway Patrol Officer Angel Arceo said.
The man was driving on the lefthand shoulder of the highway and was probably going between 70 to 75 miles per hour, fast enough to pass a vehicle in the fast lane, Arceo said.
But suddenly, he appeared to lose control of his car and crossed both lanes of Highway 99, Arceo said. His truck hit the metal guard rail and then overturned, hitting the concrete abutment of an overpass.
The truck came to rest on its roof, Arceo said. The driver was wearing a seat belt, and Arceo said CHP does not believe drugs or alcohol were involved. The investigation is ongoing.
“We have no idea why he lost control. We don’t know what caused him to do that,” Arceo said.
As officers investigated and cleaned up the accident, traffic was stopped between Victor and Turner roads for about an hour.
At about 12:10 p.m., the highway reopened with cars driving single file on the shoulder.
CHP officers also guided cars and trucks to turn around on the highway and get off at the Turner Road exit.