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- เผยแพร่เมื่อ 2 พ.ค. 2016
- WMATA Arcing/Smoke Event with Passenger Evacuation at L’Enfant Plaza Station
Washington, D.C. January 12, 2015
DCA15FR004
This animation/video presentation shows the sequence of events on the day of the accident. The accident took place on the afternoon of Monday, January 12, 2015, when electrical arcing occurred in the Washington Metropolitan Area Transit Authority (WMATA) Metrorail Yellow Line tunnel approximately 2000 feet south of L’Enfant Plaza Station, with heavy smoke in the tunnel and the station. First, a two-dimensional animation is used to provide an overview of events to provide background for the board meeting. The animation is followed by a surveillance video from inside L’Enfant Plaza Station showing the movement of trains and people as smoke builds up in the station. The animation/video includes audio with a voice-over narration.
The animation begins with an area map of part of the WMATA Metrorail system (not to scale) on the left side of the screen, depicting an overall view of the location of the L’Enfant Plaza Station and the east/west Blue, Silver and Orange Line tracks crossing the north/south Yellow and Green Line tracks passing through the station. The location of arcing in the Yellow line is indicated approximately 2000 feet south of L’Enfant Plaza station, next to a vent shaft in the vicinity of Water Street. A timeline of selected events is displayed on right side of the screen, showing the time and a description of each selected event, which appears when mentioned in the narration. The illustration of the
sequence of events starts at 3:05 pm when a smoke alarm activated near the location of the electrical arcing. The motions of southbound Train 302 and southbound Train 510 are illustrated graphically. A photograph shows smoke coming from the ventilation shaft opening near Water Street. The information in the narration is highlighted in text boxes on the screen as each event takes place, with selected events recorded in the timeline on the right side of the right side of the screen. The final event in the animation is the evacuation of all passengers from Train 302 at 4:27 pm.
The animation is followed by surveillance video from inside the L’Enfant Plaza Station looking southbound toward the tunnels for Metro’s Green and Yellow Lines. The video
is played ten times faster than actual speed. The video shows smoke first visible coming from the tunnel at 3:09. At approximately 3:13, Train 302 enters L’Enfant Plaza Station and stops at the platform for about 40 seconds, continuing southbound into the tunnel along the Yellow Line. Smoke can be seen coming from the southbound tunnel. Passengers on the platform evacuate the station. Southbound Train 510 stops on the platform at about 3:23 and remains stopped at the platform. At about the same time, a northbound train stops without opening the train doors and then proceeds to the next station.
Given that the NTSB's national headquarters is in L'Enfant Plaza, I have to imagine that this is a comparatively fast accident to investigate.
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So how did the NB train get through?
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the smoke alarm activated at 3:05 pm thats what caused the smoke