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- เผยแพร่เมื่อ 22 มิ.ย. 2015
- Description/Disclaimer for Investigative Hearing Presentation
WMATA Arcing/Smoke Event with Passenger Evacuation
at L’Enfant Plaza Station
Washington, D.C.
January 12, 2015
DCA15FR004
Investigative Hearing
This animation/video presentation shows a sequence of events on the day of the accident. The accident took place on the afternoon of Monday, January 12, 2015, when electrical arcing near the third rail 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 Investigative Hearing. 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 and Orange Line tracks crossing the north/south Yellow and Green Line tracks passing through the station. The location of arcing near the third rail 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 502 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 30 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.
The emergency exhaust fans require a MANUAL command to start working? Brilliant...
Hard to believe it happened in DC Good job NTSB
The smoke didn't appear from 3:09 to 3:14. That's why the train got stuck.
so they had an alarm, (smokedetector) and still they keep on letting them drive into the point where the smoke was already detected. that is just stupid!
WHY THOUGH?!
Could only imagine how it was on the train stopped in the tunnel with all that smoke for that long.
But the question is… what happened to the train? Did it catch on fire? Did it survive when the smoke had disappeared and the fire extinguished?
Totally unacceptable. Confusion and stupidity ruled.
i feel the same way
Gosh, if the arcing was 3000f from the station it must have spread SUPER FAST to get there at 3:09 if it started at 3:05
What the smoke alarm like? 🚨 🤤
The people who exit train 302 are safe (unless if they went to the orange blue sliver lines
but why did it have to be at a busy station? (this was stupid)
When the Third Rail gets littered with cigarettes.
So, they had a smoke detector go off right by that ventilation shaft. And the reason they didn't turn on those fans immediately is?
Who knows?
A very plausible reason could be that they didn't want to add an oxidizer (oxygen from air) to a fire (hint : The fire triangle).
Also: They didn't know what was going to happening in the future
Can't be sure which mode to activate ventilation fans - exhaust or resume ventilation. I.E. Mont Blanc Tunnel Fire. While allowing vehicles to exit one side, they also fueled the fire with fresh oxygen.
The reason they didn’t immediately turn on the fans is because the Rail Operations Control Center (ROCC) didn’t actually know that the alarm had been activated because of a loose wire connecting the smoke alarm to the communications system, which severed the connection and ensured the smoke alarm’s signal wasn’t received by anyone. They had no idea the alarm had been activated.
Couldn't train 302 back up into the station ?
If the next train hadn't come. Even then, proper situation management... They could've stopped the 2nd train before it even came (allowing 502 to reverse).
@@TEMPLE7D Who's minding the monitors ? ? ? "situation management" that's the key phrase !
3:15 is the video
what caused the smoke though?
the smoke alarm probably produced smoke
Probably something you did, Elizabeth.
Litter between the high voltage third rail and the ground caused electrical arcing and the litter to ignite. Even a small fire in a tunnel causes a huge amount of smoke because instead of it rising up into the atmosphere it spreads along the rest of the tunnel looking for a way out.
@@metropolisubway47 how can a smoke alarm that is used to detect smoke just make smoke and detect it’s output? That’s just dumb!
The fire
Why did it take 50 minutes for firefighters to enter?
it took probably 35-40
Notice that third rail power to the scene wasn't completely cut till 3:49. The firefighters arrived at the train at 3:50. It would have been unsafe to have sent personnel onto the trackbed with live power still flowing.
@@ElDictatorJoe There should be systems in place which automatically cut power if there is a short circuit.
There's nothing wrong with arcing, hope you know that.
dc smoking
Woah, an old comment that I commented back in 2017. I was a little stupid kid back then.