Investigation reveals design flaw as cause of major Chicago train crash

The Yellow Line train crash in Chicago was caused by a "design problem" with the train's braking system, according to federal investigators. The train had a stopping distance nearly 1,000 feet too short, and the braking system should have allowed for a longer distance. The investigation is ongoing, but it appears that the crash was not caused by the presence of the snow fighter train on the tracks. The NTSB has not yet made any recommendations, but the CTA can implement changes to improve safety.