Normal Blue Line service resuming after track issues near Jefferson Park

Normal service is resuming for Blue Line trains after track problems caused four hours of major delays Friday morning near the Northwest Side Jefferson Park station.

Forest Park-bound trains were temporarily stopped because of a “track condition” about 8:30 a.m., according to an alert from the Chicago Transit Authority. A CTA spokeswoman said a large section of the electrified third rail failed in the area and crews were dispatched to repair it.

Trains operated on a single track in both directions between Harlem and Montrose, according to the CTA.

Normal service on both tracks resumed with residual delays by 12:35 p.m., officials said.