The
National Transportation Safety Board (NTSB) was responsible for investigating the accident. An
NTSB "go team" was sent to the scene, and the
Federal Railroad Administration also dispatched investigators. Although injured, the train engineer cooperated with the investigation, The engineer lacked any memory of the accident itself. The day following the crash, investigators retrieved one of the two
train event recorders (black boxes) from the wreckage, but it was unusable. The second black box was successfully recovered in the first week of October 2016. On October 4, 2016,
FEMA claimed responsibility for what appeared to have been a hijacking of
Utica, New York TV station
WKTV foreshadowing the disaster, which was under independent investigation by
Snopes. FEMA told Snopes that they were conducting cross-nation tests for the
EAS test and development message aggregators, using lines from various
Dr. Seuss books as placeholder messages, when WKTV's EAS device mistakenly relayed to the public the messages it received in its testing environment. The chosen verse from
Green Eggs and Ham and its proximity to Hoboken was purely coincidental, and FEMA had no culpability in the train crash. On October 6, 2016, the train was removed from the station area for further investigation. In November 2016, attorney Jack Arsenault said his client, the train engineer Thomas Gallagher, suffered from severe
sleep apnea which was undiagnosed until after the crash. NJ Transit has a sleep apnea screening program but, despite that, a physical exam in July 2016 had cleared Gallagher for duty. Gallagher, aged 48 and with 18 years experience as a train engineer, said he had no memory of the crash and was lying on the cab floor when he woke up after the impact. An official briefed on the investigation told
The Associated Press under condition of anonymity that the investigation had considered whether sleep apnea was a possible cause of the crash.
Cause On February 6, 2018 the NTSB released their probable cause of the accident. The NTSB determined that the engineer's failure to stop was caused by fatigue due to undiagnosed
sleep apnea. Contributing to the accident was NJ Transit's failure to follow their internal sleep apnea screening guidance to find at-risk workers and refer them for testing and treatment. NJ Transit failed to identify end of track collisions as a hazard despite numerous previous accidents. Additionally, the FRA was cited for their failure to require railroad to screen safety-critical workers for sleep disorders. The FRA exempted NJ Transit from installing
positive train control (PTC) at Hoboken Terminal. The NTSB stated that PTC could not be relied on to prevent end of terminal accidents. They stated the need for other technology to intervene prior to the collision. ==Aftermath==