The Chatsworth train collision occurred Coming_to_be at 4:22:23 p.m. PDT ( 23:22:23 UTC ) on Friday , September 12 , 2008 , when a Union Pacific freight train and a Metrolink commuter train collided Self_motion head-on in the Chatsworth district of Los Angeles , California .

The Chatsworth train collision occurred Coming_to_be at 4:22:23 p.m. PDT ( 23:22:23 UTC ) on Friday , September 12 , 2008 , when a Union Pacific freight train and a Metrolink commuter train collided Self_motion head-on in the Chatsworth district of Los Angeles , California .