MTA chief Veronique "Ronnie" Hakim toured the scene late Thursday and was "cautiously optimistic for near-normal" Metro-North train service by Friday, the MTA said via Twitter.
The derailment occurred on the New Haven Line, which runs through Connecticut.
All the passengers were safely moved off the train after the minor derailment at about 5:15 p.m. Thursday near the station in Rye. No injuries were reported.
But the incident was still causing big delays into the night, with delays of nearly an hour reported for trains going through Rye for much of the evening, Metro-North said.
By 11 p.m., the New Haven Line Service was experiencing delays of up to 25 minutes in the vicinity of Rye. Trains were still limited to two tracks in the area.
Service to Grand Central was to resume late Thursday from Greenwich, Port Chester and Rye but will board on the eastbound (to Stamford) track. New York-bound service had been suspended for much of the evening at those stations.
The derailment involved several cars on the train and occurred east of the train station, behind the Avon building on Midland Avenue in Rye.
All of the train cars remained upright, Metro-North said.
Passengers on the derailed train were transferred to another train about an hour after the incident, Metro-North said.
Train riders are advised to listen for announcements at their local stations.
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