Driver of train that crashed in Hoboken tells federal agents he has no memory of the accident as it's revealed one on the black boxes is broken.

Driver of the train Thomas Gallagher, 48, is cooperating with investigators from the National Transportation Safety Board.

NTSB official told the press that Gallagher has no recollection of the accident that killed one person and injured 114.

Gallagher says he does remember driving under the speed limit as the train pulled into the Hoboken terminal.

NTSB says that a recording box recovered from the back of the train was not functioning.

Investigators now hope to recover the black box from the front of the train in the hope that it will shed light on how fast the train was going.

Bella Dinh-Zarr, the vice chairman of the National Transportation Safety Board, held a news conference on Sunday.

The federal agency investigating last Thursday's horrific train accident in Hoboken says that the driver was well-rested before the crash and that he has no recollection of the speed at which the locomotive was going at before it barrelled into the New Jersey terminal.

Bella Dinh-Zarr, the vice chairman of the National Transportation Safety Board, held a news conference on Sunday during which she said that a data recorder recovered from the commuter train was not working.

Fabiola Bittar de Kroon, a 34-year-old mother who was standing at station's platform was killed and 114 others were injured when the No. 1614 Pascack Valley line train that crashed around 8.30am.

It had left Spring Valley, New York at 7.23am and was scheduled to arrive in Hoboken at 8.38am.

Conductor Thomas Gallagher, 48, (pictured) who was operating the train that crashed in Hoboken, New Jersey, yesterday was not under the influence of drugs or alcohol.

The married father-of-two has been working for New Jersey Transit for 29 years.

Passengers said the train never slowed down as it approached the station, crashing at a 'high-rate of speed' into the terminal which tens of thousands of people use to travel into New York City every day.

The driver, Thomas Gallagher, underwent a blood test, which came back negative for drugs and alcohol.

Gallagher, 48, is a married father-of-two who lives in Morris Plains, New Jersey. His father said he has been working in train transportation since he was 19 years old.

Dinn-Zahr told reporters on Sunday that Gallagher said he was well-rested on the morning of the accident but that he has no recollection of what took place immediately before the crash.

The NJ Transit train ran off the end of the track as it was pulling in around 8.45am, smashing through a concrete-and-steel bumper and knocking out pillars, causing the roof to collapse.

Investigators believe that the black box will indicate precisely what speed the train was going when it failed to stop at the Hoboken station.

'We want to get in and get the exact speed of the train,' Dinn-Zahr said. 'We're unable to do that, unfortunately - one of the event data recorders was not functioning.'

'We hope we'll be able to get that. It's unclear right now what the speed was, so we won't know until we actually get that information.'

The authorities are currently removing the wreckage and attendant debris at the site.