NTSB: Fatigue Played Role in 2008 MBTA Trolley Wreck
WASHINGTON — The National Transportation Safety Board determined that the two-train collision on the Massachusetts Bay Transportation Authority (MBTA) Green Line last year occurred as a result of the trolley operator’s failure to obey a signal indication likely because she became disengaged from her environment consistent with experiencing an episode of micro-sleep. The lack of a positive train control system, which would have intervened to stop the train and prevented the collision, was cited as a contributing factor. At 5:51 PM EDT, on May 28, 2008, an MBTA Green Line train, traveling westbound at about 38 mph, struck the rear