NEW YORK — The Metro-North Railroad train that derailed on Sunday, killing four people and injuring dozens more, was traveling at roughly 82 mph just before it veered off the tracks, federal investigators said on Monday, more than twice the allowable 30 mph speed through a curving stretch of track.
Earl Weener, a board member with the National Transportation Safety Board, said that it remained unclear if the speed was the result of human error or faulty equipment. But the train’s data recorders, which revealed the speed, also indicated that the pressure on the throttle did not drop to zero until six seconds before the derailment.
The extraordinary speed shed new light on the deadliest New York City train derailment in more than two decades. Full story for BostonGlobe.com subscribers.