What to Know
- Data recorders from the NJ Transit train that crashed into Hoboken Terminal revealed the train was going 21 mph at the time of the crash.
- The train's horn sounded 1 minute before the crash, and it sped up for 38 seconds. The brake was hit 1 second before impact.
- The recorders -- known colloquially as "black boxes" -- included video, audio and other data from the crashed train.
A New Jersey Transit commuter train sped up and was going twice the 10 mph speed limit just before it crashed into Hoboken's terminal last week, killing a woman on the platform and injuring more than 100 people, federal investigators said Thursday.
The train's engineer hit the emergency brake less than a second before the train slammed into a bumping post at the end of the rail line, went airborne and hurtled into the station's waiting area, according to information released by the National Transportation Safety Board.
The NTSB said the findings were gleaned from a data recorder and video from a forward-facing camera in the front of the train.
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According to the NTSB, the train was traveling at 8 mph and the throttle was in the idle position less than a minute before the Sept. 29 crash. Approximately 38 seconds before the crash, the throttle was increased and the speed reached a maximum of about 21 mph, the agency said. The throttle went back to idle and the engineer hit the emergency brake less than a second before the crash, investigators said.
NJ Transit trains have an in-cab system designed to alert engineers with a loud alarm and stop locomotives when they go over 20 mph, according to an NJ Transit engineer who wasn't authorized to discuss the accident.
The engineer said the throttles have eight slots, putting the fourth spot at about half power. The engineer said the throttle should be set to idle, or the first and slowest speed spot, when entering Hoboken Terminal. The tracks into the station run slightly downhill, so there would be no need to push the throttle any higher, the engineer said.
An NTSB spokesman said he didn't know if the alert system went off. He said it's being looked at as part of the investigation.
Video from the train's forward-facing camera showed the front of the train smashing into and overriding the bumper at the end of the track, causing a large flash, investigators wrote.
The force of the collision dislodged part of the terminal ceiling and sent concrete and wires raining down onto the train. Witnesses described pulling bleeding survivors out from under piles of debris while other passengers kicked out windows and jumped out.
Thursday's report contained no analysis of the data retrieved and no explanation for why the train increased speed. NTSB technical experts and the parties to the investigation are scheduled to meet in Washington, D.C., next Tuesday to continue reviewing the data and video from the train.
The damaged train, which originated in Spring Valley, New York, about 35 miles away, was to be removed Thursday evening, a New Jersey Transit spokeswoman said.
Also Thursday, NJ Transit implemented a new rule for pulling into two of its stations.
The conductor must join the engineer whenever a train pulls into Hoboken Terminal or its Atlantic City station, NJ Transit spokeswoman Jennifer Nelson said. That means a second set of eyes will be watching as a train enters the final phase of its trip at stations where there are platforms at the end of the rails. The New York Times first reported the policy.
The engineer was alone when the train crashed into the Hoboken station. He has told federal investigators he has no memory of the crash.
Some rail safety experts caution that having a second person in a cab isn't automatically safer, since crew members can sometimes distract each other. In 1996 outside Washington, D.C., a commuter train engineer was thought to have been distracted by a conversation with a crew member, causing a crash with an Amtrak train that killed 11 people.
Investigators recovered the data recorder, a video recorder and the engineer's cellphone from the front car of the NJ Transit train on Tuesday. The equipment was sent to an agency lab in Washington for analysis.
A final report on what caused last week's crash could take a year or longer to complete.