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 is considering sleep apnea as a possible cause of the crash. Hoboken Terminal has the original steel-and-concrete bumpers from when it was opened in 1907. It is believed newer bumpers with hydraulic shock absorbers and sled-like friction shoes would have reduced the impact. Following the train crash, New Jersey Transit issued new regulations requiring that engineers must be accompanied by at least one other crew member as they pull a train into Hoboken Station. In addition NJ Transit also mandated a reduction in the approaching speed limit into the train station from 10 miles per hour to 5 miles per hour. The Hoboken Terminal remained closed until October 10, when a limited number of platforms were reopened with a modified service schedule. Full service was not restored until October 17; Tracks 5 and 6, where the train crashed, remained closed while repairs were carried out. A similar accident occurred at the same station in December 1985, injuring 54 people. The 1985 crash was said to have been caused by a lubricant that had been applied to the tracks to test train wheels. In May 2011, a PATH train crashed in the basement of Hoboken Terminal, causing minor injuries. Investigators said that they will look into the possibility that the 2011 and 2016 accidents may have similar causes and circumstances. The December 2013 Spuyten Duyvil derailment was attributed to sleep apnea, which is a suspected factor in the 2016 Hoboken crash. Other accidents where engineers had sleep problems: