Damaged equipment on two South Shore commuter train cars Monday near the East Chicago station caused delays for passengers into the evening.
John Parsons, spokesman for the Northern Indiana Commuter Transportation District, said work to repair the damage is expected to continue into Wednesday. However, no delays were anticipated for Tuesday morning's rush hour, he said.
"We'll have the morning rush hour trains heading westbound take priority over eastbound trains," he said.
The damage happened on Train No. 116, originally scheduled to arrive at Chicago's Millennium Station at Randolph Street at 12:39 p.m. The train was delayed indefinitely because of damage to the pantographs on the rear two cars of the six-car train.
The pantographs stand atop the trains and touch the wire above to bring power to the electric trains.
Maintenance crews were out Monday evening trying to make repairs to the line.
The damage forced all trains to operate on Track 1 from the Indiana/Illinois state line to Gary, which caused delays to westbound and eastbound trains Monday. Typically the trains run on two tracks.
Parsons said Monday afternoon's rush-hour passengers experienced delays of 20 to 30 minutes. Most of the delays were attributed to westbound trains waiting for Track 1 to clear.
The delays continued into the evening with some trains being late by as much as an hour. The eastbound Train No. 19 leaving Millennium Station at 7:10 p.m. was delayed by 45 minutes to 60 minutes, according to NICTD's website.
Parsons said officials had not assessed how much the repairs were going to cost.
"Our main concern are our passengers," he said.