Back in October of 2013, two Chicago Transit Authority Blue Line trains collided after an out of service train struck the end of another train that was stopped to load/unload passengers.
This morning, an inbound Blue Line train entering the O’Hare Airport station (which serves as the southern terminus for the Blue Line) overshot the bumper blocks at the end of the track, causing the front-most train to travel up the escalator that leads from the mezzanine level onto the platform level. The incident resulted in 32 injuries, and the cause is still under investigation.
Like the October, 2013 incident, safety protocols that would have stopped the train from overshooting the tracks did not seem to engage. Investigators will be figuring out why this was the case.
At this time, the Blue Line is CLOSED between O’Hare and Rosemont stations. Please visit the CTA website for updates.
The Global Transit Guidebook 