Two Spanish racers were killed in a chain-reaction crash on the first lap of a World Superbike race at Mazda Raceway at Laguna Seca.
Police say Nicolas Holzer called 911 and calmly said he had killed his family members.
Bay Area Rapid Transit officials have stopped a practice that made employee teams solely responsible for their own safety on the commuter rail line’s tracks.
The families of two people killed at a Marysville raceway a week ago say they want the racing season to go on as normal.
Highway deaths have fallen to levels not seen since the Korean War, helped by more people wearing seat belts, better safety equipment in cars and efforts to curb drunken driving.
The U.S. Bureau of Land Management said Friday its staff failed to properly monitor and prepare for an off-road race in which eight spectators were killed in the Mojave Desert.