1982: The last day of operations by the Southern California Rapid Transit District at the joint SCRTD/Greyhound Depot at 6th and Los Angeles Streets.
2008: A Metrolink commuter train and a Union Pacific freight train collide head-on along a curved section of single track on the Metrolink Ventura County Line just east of Stoney Point in Chatsworth at 4:22 p.m.
The accident resulted in 25 deaths and the subsequent Rail Safety Improvement Act of 2008 requiring Class I Railroad mainlines with regularly scheduled intercity and commuter rail passenger service to fully implement PTC braking technology by December 31, 2015. By 2015, few railroads are anywhere close to implementing PTC and extensions have been granted.
More information can be found in the September 15, 2008 post of the MyMetro employee news magazine.