Metrorail Emergencies - May 2016 Flashcards
A short section of third rail found just beyond some station platforms to ensure uniform train acceleration.
Accelerator rail (AKA kicker rail)
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One or more rooms in all Metro stations wherein electricity from the utility company is received and distributed for station and Rail Roadway use.
AC switch board room
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Any portion of the Rail Roadway above the level of the surrounding terrain usually supported on columns spanned by concrete or steel beams.
Aerial structure
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Rooms in or near a rail station containing mechanical equipment or services facilities, and where most smoke and heat detectors are located.
Ancillary rooms
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The track or station constructed at or near the surrounding ground surface level.
At-grade
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The coarse gravel that forms a bed for a railroad, for the purpose of creating a surface to hold the track in line.
Ballast
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