Aaron Donovan, spokesman for the Metropolitan Transportation Authority, said the National Transportation Safety Board, which is investigating the crash, gave Metro-North the OK to remove the trains. He said hundreds of feet of track need to be repaired.
Later Sunday, the Connecticut Department of Transportation is set to announce jointly with Metro-North a plan for the rush-hour commute beginning Monday.
Investigators are focusing on a broken section of rail line as they try to determine the cause of the train derailment on Friday. NTSB member Earl Weener said the broken rail is of substantial interest to investigators and a portion of the track will be sent to a lab for analysis.
Weener said it's not clear if the accident caused the fracture or if the rail was broken before the crash. He said he won't speculate on the cause of the derailment and emphasized the investigation was in its early stages.
Dozens of people were hurt when the train derailed near Bridgeport, Conn., leaving its center cars leaning directly into the path of an oncoming train on the adjacent tracks.
Investigators say it does not appear the incident was the result of foul play.
Service has been suspended between South Norwalk and New Haven, which includes stops at 12 stations.
The last significant train collision involving Metro-North occurred in 1988 when a train engineer was killed in Mount Vernon, N.Y., when one train empty of passengers rear-ended another, railroad officials said.
The Associated Press contributed to this report.