A truck overturned on Highway 101 in San Francisco, spilling a cement mix and snarling traffic as the Thursday evening commute was just starting, according to the California Highway Patrol.
The crash occurred on a northbound 101 overpass at Bryant Street, and authorities were asking people to avoid the area, as debris from the spill also was falling onto streets below.
The truck appeared to be carrying a dry cement mix or gravel.
All northbound 101 lanes were blocked at Ninth Street, and the CHP issued a Sig-alert at about 4 p.m. The freeway was closed for hours as crews cleaned up the spill, removed the truck and waited for Caltrans to deem the overpass structurally sound.
The CHP initially said the closure could be up to four hours, but it lasted more than six hours as the roadway didn't reopen until about 10:30 p.m.
