Service on the 1 train is back up in Manhattan after a derailment yesterday in Harlem.
Trains started running again shortly after 6:30 a.m.
They were suspended along much of the line overnight.
The MTA says shortly before 6 p.m. yesterday the first set of wheels under the first car of a southbound 1 train jumped the tracks between the 125th Street and 116th Street.
No one was hurt, but several hundred passengers had to be rescued from the disabled train
"We had about 350, 400 people on board the train. Everybody was okay and our crews worked through the night so that they had to replace and repair a lot of the third rail and a lot of the protection that covers the rail. That work took roughly 12 hours," said MTA Spokesman Adam Lisberg.
It's still not clear what caused the train to jump the tracks.