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The 1990 Back Bay, Massachusetts train collision was a collision between an Amtrak passenger train, the ''Night Owl'', and a Massachusetts Bay Transportation Authority (MBTA) Stoughton Line commuter train just outside Back Bay station in Boston, Massachusetts. An investigation by the National Transportation Safety Board (NTSB) found that the Amtrak train entered a speed-restricted curve at excessive speed, causing the train to derail and crash into the MBTA commuter train on an adjoining track. Although no one was killed in the accident, 453 people were injured and Back Bay station was closed for six days. Total damage was estimated at $14 million. The accident led to new speed restrictions and safety improvements in the vicinity of Back Bay and a revamp of Amtrak's locomotive engineer training program. == Accident == Amtrak #66, the ''Night Owl'', departed Union Station in Washington, D.C. at 10:30 PM on December 11, 1990. The ''Night Owl'' was Amtrak's overnight service on the Northeast Corridor and was scheduled to arrive at Boston's South Station at 8:35 AM on December 12. At the time, electrification ended at New Haven, Connecticut, so two EMD F40PH diesel locomotives were assigned to pull the ''Night Owl'' from New Haven to Boston. Behind the two locomotives were a material handling car, a baggage car, three coaches, a dining car, two sleeping cars, another baggage car, and another material handling car. As the train approached Back Bay, a scheduled stop, there were seven crew and 190 passengers aboard.〔 MBTA #906 was a regularly-scheduled commuter train on the Stoughton Line, inbound from Stoughton to South Station. The train consisted of an EMD F40PH-2 diesel locomotive, similar to the Amtrak locomotives, six passenger coaches, and a control car. The train operated in push-pull mode, meaning that the locomotive was on the rear of the train and the locomotive engineer controlled operations from the control car in the front. At the time of the accident the commuter train was coming to a stop at Back Bay, a scheduled stop, and had five crew and 900 passengers aboard.〔 The western approach to Back Bay is a triple-tracked tunnel, with tracks numbered 3, 1, and 2. The MBTA train was on track 1 and the ''Night Owl'' on track 2. The two tracks are immediately adjacent with no barrier between them. At the time the maximum speed for all three tracks was . The lead Amtrak locomotive, #272, entered the curve into Back Bay at , more than twice the maximum authorized speed. At 8:23 AM the locomotive left the tracks and struck the MBTA locomotive on the adjoining track. As the collision occurred in downtown Boston, emergency medical services were on the scene almost immediately. The subsequent NTSB investigation reported 453 injuries: 50 on the ''Night Owl'', 396 on the MBTA train, and seven firefighters who responded to the crash.〔 The collision destroyed all three locomotives, five Amtrak cars, and one MBTA coach. The tunnel suffered structural damage to its support columns.〔 Dartmouth Street, immediately above the tunnel, had to be resurfaced: during the collision the two trains jackknifed and created a hole in the street. Back Bay was closed for six days after the accident. The total damage was estimated at $14 million, not including personal injury claims: $9 million in damage to infrastructure and rolling stock and a further $5 million in cleanup costs.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「1990 Back Bay, Massachusetts train collision」の詳細全文を読む スポンサード リンク
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