https://www.mercurynews.com/2019/08/05/collision-involving-rv-camper-closes-part-of-i-580-in-oakland/

OAKLAND — All four eastbound lanes of Interstate 580 near Seminary Avenue in East Oakland were closed Monday morning after a collision involving at least two vehicles left an  RV camper overturned blocking the lanes, the California Highway Patrol said.

A Sig Alert was issued  after the 5:08 a.m. collision and one lane was reopened about 6:48 a.m.  It was not known when all lanes would reopen.