Metro Flashcards
(161 cards)
Define Accelerator Rail (Kicker Rail)?
small portion of the 3rd rail that ensures acceleration. Found just beyond some station platforms.
pg.2
“Accelerator Rail (Kicker Rail): A short section of third rail found just beyond some station platforms, to ensure uniform train acceleration.”
Define AC Switch Board Room?
a room where electricity from the utility company is received and distributed for station & rail roadway use
pg.2
“AC Switch Board Room: One or more rooms in all Metro stations wherein electricity from the utility company is received and distributed for station and Rail Roadway use.”
Define Aerial Structure?
Any rail roadway above level of surrounding terrain
pg.2
“Aerial Structure: Any portion of the Rail Roadway above the level of the surrounding terrain usually supported on columns spanned by concrete or steel beams.”
Define Ancillary Rooms?
Room with mechanical equipment or service facilities. Where most smoke & heat detectors are located.
pg.2
“Ancillary Rooms: Rooms in or near a rail station containing mechanical equipment or service facilities, and where most smoke and heat detectors are located.”
Define At-grade
Track or station at or near ground surface level.
pg.2
“At-Grade: (surface) the track or station constructed at or near the surrounding ground surface level.”
Define Ballast?
Gravel bed for the railroad. Holds the track in line.
pg.2
“Ballast: The coarse gravel that forms a bed for a railroad, for the purpose of creating a surface to hold the track in line.”
Define Bulkhead Door?
Door at the end of rail car, used for employee car passage and disembarking between stations during emergencies.
pg.2
“Bulkhead Door: The door on the end of a rail car used for employee passage from car-to-car or for disembarking between stations during emergencies.”
Define Bi-directional (Two Directional)
approaching the scene from opposite directions. Escpecially on aerial structures, in tunnels and when exact location isn’t clear.
pg.2
“Bi-directional (Two Directional): A means of approaching the incident scene from opposite directions. This method is required and especially effective for incidents on aerial structures, in tunnels, and when the exact location is not clear.”
Define Chain Marker?
a measurement system displayed every 100 ft along rail roadway. The sign denotes the distance in ft from the HUB.
pg.2
“Chain Marker: A measurement system sign displayed every 100 feet along the Rail Roadway. The sign denotes the distance in feet from the HUB, the center point of the line (either Metro Center or Gallery Place). A chain marker written as K2 [color] 525+00 would be interpreted as K line, track 2, Orange Line, 52,500 feet from the HUB. The signs appear between the tracks or are affixed to the fence along the at-grade or elevated Rail Roadway, or mounted on the walls of the tunnels throughout the Metro system. Chain markers may also be found on ancillary buildings or rooms as a means of fixing their location within the system.”
What does this Chain marker signify?

B line, Track 2, Orange line, 13,200 ft from HUB
pg.2
“A chain marker written as K2 [color] 525+00 would be interpreted as K line, track 2, Orange Line, 52,500 feet from the HUB.”
Define Chemical Biological Emergency Management Information System (CB-EMIS)?
Program system that manages info from the PROTECT detectors.
pg.2
“Chemical Biological Emergency Management Information System (CB-EMIS): The program system that manages the information received from the PROTECT detectors.”
Define Chiller Plant?
consist of water cooling towers, evaporator pumps, and condenser pumps. Water is circulated through these and distributed to various structures in its system.
pg.2
“Chiller Plant: A chiller plant consists of, among other items: water cooling towers, evaporator pumps, and condenser pumps. Water is circulated throughout these mechanisms and distributed to the various structures in its system. Water returns back to the plant via pipelines and is cooled again removing the heat.”
Define Collector Shoe?
A Collector shoe rides on the top of the contact rail, transferring the DC voltage to the train.
pg.3
“Collector Shoe (see also Paddle): The car-borne device designed to slide on the third rail to pick up DC propulsion current. The collector shoes are located in the center of each truck assembly on each side, four shoes per rail car.”

Define Common Corridor?
Shared transportation Rail Roadway.
Metrorail runs in median strip of interstate highway or adjacent to, above or between railroad tracks of other systems.
pg.3
“Common Corridor: The shared transportation Rail Roadway where MetroRail runs in the median strip of an interstate highway or adjacent to, above, or between railroad tracks belonging to other railroad systems.”
Define Command Conference Line?
A telephone system that allows a number parties to hold convo on the same line from phone within/outside of the metro system.
pg.3
“Command Conference Line: Capability of the telephone system to allow a number of parties to hold a conversation by telephone, on the same phone line, from phones within or outside of the Metro system.”
Define Consist?
A term that denotes the number of rail cars in a train.
pg.3
“Consist: A railroad term that denotes the number of rail cars in a train. For example, a six-car consist is three married pairs of rail cars under the control of one operator.”
Define Coupler?
A device used to connect one car to the other.
pg.3
“Coupler: A mechanical device on each end of a rail car used to connect one car to another.”
Define Cover Board?
A gray, fiberglass-like material over the top of the third rail. It’s an insulator and provides some protection from 3rd rail contact.
pg.3
“Cover Board: The gray, fiberglass-like material over the top of the third rail. It is an insulator and provides some protection from inadvertent contact with the third rail.”

Define Dynamic Breaking?
A method of train breaking involving kinetic energy
pg.3
“Dynamic Braking: A method of train braking where kinetic energy from train movement generates current at the traction motors, and is dissipated by the resistor grids.”
Define Elevated (or Aerial) Rail Roadway (RRW)?
Portion of track above ground.
pg.3
“Elevated (or Aerial) Rail Roadway (RRW): The portion of track constructed above the adjacent ground surface (aerial structures and stations).”
Define Emergency Evacuation Door Release (EEDR)?
Allows responders to open side center doors without key or train door power.
pg.3
“Emergency Evacuation Door Release (EEDR): A safety feature that allows emergency responders to open side center doors without a key and with or without train door power.”
Where is the Emergency Evacuation Kit (EEK) located?
right, rear, double-sided seat of every car.
pg.3
“The EEK is located under the seats of the right, rear, double-sided seat of every car.”
What does the Emergency Evacuation KIT (EEK) contain?
glow sticks
1 flashlight
1 traffic/safety vest
On the B car (odd number) a battery-operated bullhorn.
pg.3
“Emergency Evacuation Kit (EEK): One red bag containing glow sticks, one flashlight, one traffic/safety vest, and, on the B car (odd number), a battery-operated bullhorn can be found. The EEK is located under the seats of the right, rear, double-sided seat of every car.”
Where is the Emergency Exit located?
In the vent shaft farthest from the normal exit in a single entry station, and in vent fan or emergency exit shafts between station.
pg.3
“Emergency Exit: A passage consisting of stairs to the surface with a hatch or door to the outside. This exit is located in the vent shaft farthest from the normal exit in a single-entry station, and in vent, fan, or emergency exit shafts between stations. Except in special cases, the travel distance to an emergency exit does not exceed 1,250 feet.”























