Emeryville CA - APRIL 29: Caltrans workers along with federal investigators look over the damage to the 580 hwy on April 29, 2007 in Emeryville, California. A tanker truck crashed and burned causing the elevated roadway that carried eastbound traffic from the Bay Bridge onto Interstates 580 and 980 and state Highway 24 to melt and crumble to the ground.(Photo by David Paul Morris/The Chronicle) Photo: David Paul Morris