Highway 99 Slowed By Overturned Big Rig

Traffic backed up for miles early Thursday morning after a big rig overturned on Highway 99 near Herndon Avenue.

Traffic was reduced to one lane while crews worked to get the truck back on its wheels.

The wreckage was cleaned up around 8:00 a.m. and traffic eventually returned to normal.

It's unknown at this time what caused the truck to flip onto its side.