More than an hour after the Hartsfield-Jackson International Airport train system went off-line, things went back to normal Friday afternoon.

Trains stopped running around 3 p.m. but were back on-line by around 4:20 p.m., airport spokesman Reese McCranie said.

A computer problem with the train system had brought the trains to a halt and forced people to walk from terminal to terminal.

“Atlanta Police Department officers, security teams, airline staff, operations employees and medical teams assisted with the flow of passengers and eased congestion,” according to a news release from the airport.