Around 6:45 a.m., the glitch halted Metra trains on the Milwaukee District-North, North Central Service, BNSF, Milwaukee District-West, SouthWest Service and Heritage Corridor lines, the transit agency said. About a half hour later, trains were slowly being let into and out of the station via manual controls, which caused significant delays, Metra said.
Amtrak computers began coming back online around 7:55 a.m., but Metra said it still had to manually switch trains for some time and delays of about an hour persisted. Trains were back on schedule by 11:30 a.m.
Metra urged riders to monitor its website.
About 50,000 commuters use the 6 train lines affected during the morning rush each day.