The Chatsworth train collision occurred on September 12, 2008, when a Union Pacific freight train and a Metrolink commuter train collided head-on in the Chatsworth district of Los Angeles, California. It was one of the worst train crashes in California history, 25 people were killed. This incident occurred because the Metrolink train ignored a red signal while the conductor was busy receiving messaging. This fatal error made Mitrolink loss of about $500 million.