Sig Alert, 210 Freeway, Upland 2:56 a.m.

A tractor trailer loaded with about 50,000 pounds of windows overturned following a crash on the eastbound 210 Freeway west of Campus Avenue. Caltrans crews came to the scene to clear boulders and sand that spread across the right shoulder as a result of the incident. The CHP issued a Sig Alert at 4:07 a.m. due to the slow lane and right shoulder being blocked. As of about 6 a.m., officers said the closure would last several hours. The Sig Alert was canceled at 8:56 a.m.