October 30, 1972 In the worst railway accident in Chicago history, two commuter trains collide in early morning dense fog, killing 45 and injuring 332. The engineer of an Illinois Central Gulf train overshot the 27th Street Station. As he backed to the station, the rear of the train was not properly flagged. The train had cleared an automatic block signal, and was struck by an express commuter train. After this accident all Chicago commuter trains are painted with bright stripes at the ends of the trains.