Hazmat responds to overturned big rig near Galt | news10.net Big Rig Overturned, Blocking Traffic | KTXL FOX40 CHP said it’s unclear why the accident happened. He said the driver could have fallen asleep, or it could have been a mechanical issue. Fire crews had to break the window to get the driver out. He was conscious, but complained of pain. He also suffered minor injuries and was taken to a hospital.