1972 Chicago commuter rail crash

A collision between two commuter trains in Chicago occurred during the cloudy morning rush hour on October 30, 1972, and was the worst such crash in Chicago's history. Illinois Central Gulf train 416, made up of newly purchased Highliners, overshot the 27th Street station on what is now the Metra Electric Line, and the engineer asked and received permission from the train's conductor to back the train to the platform. This move was then made without the flag protection required by the railroad's rules. However, his train had cleared automatic block signals which cleared express train 720, made up of more heavily constructed single level cars, to continue at full speed on the same track. The engineer of the express train did not see the bilevel train backing up until it was too late. When the trains collided, the front car of the express train telescoped the rear car of the bilevel train, killing 45 people and injuring 332.[1][2]

1972 Chicago commuter rail crash
Details
Date	October 30, 1972
Location	Chicago, Illinois
Country	United States
Line	Metra Electric Line
Operator	Illinois Central Gulf
Incident type	Rear-end collision
Cause	Train backed into signal block
Statistics
Trains	2
Deaths	45
Injured	332