Chicago's CTA: ‘We anticipate restoring service’ this weekend

The agency that operates the Chicago “L” subway system said Friday that it anticipates restoring service to O’Hare International Airport this weekend.

The Chicago Transit Authority (CTA) has suspended service on its Blue Line to O’Hare since Monday, after a train derailed at the station and caused widespread damage.

The agency tweeted Friday, “service still suspended O'Hare–Rosemont, free & frequent shuttles available. We anticipate restoring svc this weekend.”

The derailment of the Chicago subway train at O’Hare Airport resulted in more than 30 passengers being injured.

The Chicago 'L' subway is the third busiest public transit system in the U.S. with an average of weekday ridership of 734,900, according to the American Public Transportation Association (APTA). The Chicago subway is only surpassed by the New York City subway and Washington, D.C.'s Metrorail in U.S. transit ridership. 

The nickname 'L' is a reference to the fact that most of the Chicago transit system's downtown tracks are elevated, but the station at O'Hare is located underground.

O’Hare is the second busiest airport in the U.S.

The National Transportation Safety Board (NTSB) has said that is investigating the CTA derailment.