MTA Train Going 82 MPH Before Derailment

Investigators say the train was going three times the as fast as it should have when it hit a curve.
3:00 | 12/03/13

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Transcript for MTA Train Going 82 MPH Before Derailment
New information on what caused that deadly train crash in new york. Investigators say it was dangerously speeding down the tracks at 82 miles per hour, into a curve, when it flew off the rails. Abc's gio benitez is at the scene in the bronx for us. Good morning, gio. Reporter: Robin, good morning to you. Right now, the key question for the train's engineer, what exactly was he doing right before that crash that injured more than 60 and killed 4? This morning, investigators are looking closely at the train's excessive speed. 82 miles per hour, nearly three-times the speed permitted through that upcoming turn. We have a major train wreck. Five cars on their side. Multiple victims. Reporter: Sources tell abc news, human error was likely the cause of the crash. Investigators are examining the engineer's cell phone to determine if he was distracted. The train had left poughkeepsie in the early morning hours on sunday. Around 7:00 a.M., The train was in the bronx area. The train speed here was 70 miles per hour. But at the curb where the derailment occurred, the speed drops to 30 miles per hour. At 82 miles per hour, with emergency brakes activated seconds before the derailment, the train didn't slow down. It was six seconds before everything came to a stop, that the throttle went to idle. The train made nine stops before coming to this curve. Clearly, the brakes were working before the train came to this curve. Reporter: Overnight, a vigil for the four people who lost their lives. James ferrari, heading to work. San kasook. Donna smith, on her way to see her sister's choral performance. And james lovell, that engineer from nbc, taking the early train to help stage the lighting of the rockefeller christmas tree. He was the best father i could ask for. Reporter: This, as the nation's sights turn to other crashes around the world. A crash in spain, also could be blamed for speeding at a curve. This engineer, texting at the time of the crash. It's too early to know if any of that was going on in this crash. But investigators did say, the brakes had been working all morning long, robin. The investigation continues. Gio, thank you.

This transcript has been automatically generated and may not be 100% accurate.

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