(FOX40.COM) — An overturned big rig on the southbound lanes of Highway 99 in Stockton briefly shut down all traffic in that direction before at least two lanes were reopened, according to the California Highway Patrol.

The CHP shared images of the big rig on its side shortly after 10:40 a.m., advising that “traffic is heavy” in the area. The vehicle was located just north of Fremont St.

Southbound drivers were being diverted to Fremont St. (SR-26).

Shortly before noon, the CHP said two lanes had been reopened, but there is still no estimated time for when all lanes will be reopened.

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This article will be updated as more information becomes available.