The solo-vehicle crash was reported at about 6:40 a.m. on eastbound Highway 580 just west of Foothill Road, Officer A. Paulson said.
No one was injured in the crash.
The two right lanes were blocked while authorities worked to get the trailer upright and move it from the roadway.
A Sig-alert was issued at 6:52 a.m. It was canceled by 8:38 a.m. when the lanes were reopened, Paulson said.