The 2008 Chatsworth Train Collision
At 4:22 p.m. on 12 September 2008, westbound Metrolink train 111 collided head-on with an eastbound Union Pacific freight train on single track near Chatsworth. Twenty-five people died and more than one hundred were injured. The NTSB found that the Metrolink engineer passed a red signal while distracted by text messaging and that the absence of positive train control allowed the error to become a catastrophic collision.
What existed before
Passenger, freight, and intercity trains shared the Ventura Subdivision through the Santa Susana Pass, where tunnels constrained the line to one track. Signals and dispatching were intended to hold one train while another cleared the section. Metrolink prohibited personal wireless-device use, but oversight inside isolated locomotive cabs was limited.
Trigger and cause
Train 111's engineer did not appropriately respond to approach indications and the red signal at Control Point Topanga. He sent a text about twenty-two seconds before impact, ran through the switch, and continued around a curve. The opposing freight crew saw the passenger train only seconds before the locomotives met at a combined speed above eighty miles per hour.
Aftermath
The Metrolink locomotive telescoped about fifty-two feet into the lead passenger coach, destroying survival space. Firefighters, police, medical teams, helicopters, hospitals, and mutual-aid agencies managed a complex rescue in the confined rail corridor. The crash killed twenty-four passengers and the Metrolink engineer and seriously strained regional trauma capacity.
Why it matters
Distraction explains the engineer's missed signal, but a safe system must also anticipate a single human error. The collision demonstrates the difference between a rule that tells someone to stop and an engineered control capable of stopping the train when that rule is not followed.
Uncertainty note
Contemporary reports briefly gave changing death and injury totals. This file follows the NTSB final report: 25 fatalities and 102 people transported to hospitals; the Board's concurring statement later refers to 135 injured. The discrepancy reflects injury-counting scope, so the summary says more than one hundred.