(KRON) -- An overturned big rig on Interstate 880 in Oakland was blocking traffic Monday. The injury crash occurred on the southbound lanes of I-880 at 29th Avenue, blocking the right and center lanes. SF power outage: PGE provides timeline for restoration as thousands remain without power Drivers a re being advised to expect delays, use alternate routes and avoid the area. The California Highway Patrol advises that a severe traffic alert has been issued. As of around 3 p.m., there is no estimated timeframe for reopening the roadway. ...read more read less