Glossary & Acronyms


AGM

Assistant General Manager


Arcing Insulator

An insulator along the third rail that may be giving off sparks or smoke


Articulated Buses

Extra-long buses with two connected passenger compartments. The rear body section is connected to the main body by a joint mechanism that allows the vehicles to bend when in operation for sharp turns and curves yet maintain a continuous interior.


At Grade

Track work constructed at the approximate level of the adjacent ground surface, rather than the elevated or subway parts of the system


Authority

Washington Metropolitan Area Transit Authority


BIE

See Brakes in Emergency


Bladensburg

Term used to refer to the Bladensburg Metrobus facility, which serves as a major maintenance/repair, washing, and storage facility. It is located along Bladensburg Road near New York Avenue.


Blowpit

An area below the tracks that blows air up to the train in an effort to keep it free of dust and other particles


Bulkhead Door

The train door on the end of the car that is used for emergency passage from car to car


BOCC

Bus Operations Communication Center


Brakes in Emergency

When the breaking mechanism on a rail car indicates that the brakes on the car need to be serviced, the train automatically brakes in a safe position/location on a track so that the brakes do not fail. Brakes in Emergency (BIE) is the actual application of the emergency braking system. When there is a BIE, the train cannot move.


Breda

Breda Costruzioni Ferroviarie; the name of an Italian manufacturer of rail cars


Bumpy Tiles

Tiles with raised domes that are located along the edge of the platform to provide a tactile method of alerting passengers that they are near the edge


TheBus

Local bus service operated by the Prince George's County (MD) Department of Transportation


Cab

The compartment of a rail car where the operator works and where the rail car's controls are located


CAF

Construcciones Y Auxiliar de Ferrocarriles is the name of a Madrid (Spain)-based manufacturer of rail cars


Canopy

The roof-type structure above Metrorail station entrances or above bus stations/terminals used to protect the entryway or customers from inclement weather


Catwalk

A narrow, often elevated walkway, as on the sides of a bridge


Central Control

See Rail Operations Central Control


CEO

Chief Executive Officer


Chain Marker

A distance of 100 feet indicated by a survey marker along the tracks identifying the distance in multiples of 100 feet to the middle of the Metro Center platform


CNG

Compressed Natural Gas


Code Red Day

When the air quality in the Washington Metropolitan Area is deemed to be very poor, the Metropolitan Washington Council of Governments (MWCOG) declares "code red days." On "code red days," Metrobus fares are waived on many Metrobus routes in an effort to encourage individuals to use public transportation instead of automobiles so as not to contribute to the poor air quality.


COG

Council of Governments for the Washington Metropolitan Area


Commuter Rail

An electronic- or diesel-propelled railway for urban passenger train service consisting of local short-distance travel operating between a central city and adjacent suburbs


Coupler

A mechanical device on each end of a rail car that is used to connect one car to another


Coverboard

The insulated cover above (and in some cases, behind) the third rail to prevent inadvertent contact with the rail and to minimize snow and ice accumulation on it. The coverboard also serves as a third rail locator, especially in yards, when the level of snow is above the third rail.


Cross Tie

One of the beams, usually made of wood, that is laid across a railroad bed to secure the rails


Customer

A passenger or patron who rides Metro or inquires about service


DASH

The local bus service provided by the Alexandria (VA) Transit Company


Deadhead

A non-revenue vehicle marked as "not in service"


Derailment

The unintentional removal of one or more train wheels from the running rail


DF

Diesel fuel


DGM

Deputy General Manager


Edgelights

The lights located along the platform edge that flash to indicate an approaching or departing train


Emergency Door

The rail car's center door equipped with a self-evacuation mechanism. Bulkhead doors at either end of the rail cars are also available for emergency-only exits.


Fairfax Connector

Fairfax County (VA) bus service


Fare

The revenue paid from a passenger to receive transit services


Farebox

The receptical used to collect the customer fees for transit services


Farecard

The currency purchased by customers that is used to travel on the Metrorail system


Faregate

The machine at the entrance to passenger stations that records information onto, and collects fare from, the farecard as a patron enters and exits the system


Fare Evasion

When an individual uses transit or attempts to do so without paying the posted fare


Fare Vendor

The farecard vending machines at the entrance to a station


Fleet

All of the vehicles that are owned or operated by a transit authority


FTA

Federal Transit Administration


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Gap Train

A train stored on a pocket track for possible insertion into a gap in the schedule if another train must be removed from service or if additional service is required


GM

General Manager


Grade Crossings

An intersection of highway roads, railroad tracks or dedicated transit rail tracks that run either parallel to or across mixed traffic situations


Headway

The time interval between vehicles moving in the same direction on a particular route


Heavy Rail

A high-speed transit mode that is an electric railway with the capacity for a high volume of traffic


Heavy Rail Passenger Cars

Rail cars operated with electric power configured for passenger traffic


Insulator

The protective covering along the third rail


IRP

Infrastructure Renewal Program


In-fill Station

A Metrorail station that is built between two existing stations after the stations on either side of it are already in use


In revenue

A train or bus that is being used to service paying customers; it is being used to generate revenue.


Interlocking

The part of the railroad where tracks can cross each other or change to direct trains along different routes. The interlocking itself is an arrangement of signals and signal appliances that permit train movements over controlled routes only if safe conditions exist.


JGB

Jackson Graham Building, the main headquarters for Metro


Judi

A term referring to the Judiciary Square Metrorail station


Jumper

An unauthorized person on the tracks


Junction

A location where train routes converge and diverge


Kicker rail

A short third rail section


Kiosk

The octagonal structure near a rail station entrance that serves as the station manager's office/booth and the hub of communications for a Metrorail station


Light Rail

A means of transit that is an electric railway with a light capacity compared to heavy rail


Line

The route that a vehicle takes to get to its destination, usually designated as a number for a bus route or a color for a rail route

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MARC

Maryland Area Regional Commuter Train Service


Married pair

Two transit rail cars that are semi-permanently coupled to each other and that share certain common equipment. Metrorail trains only operate trains with an even number of cars because it operates married pairs.


Metro

Washington Metropolitan Area Transit Authority


MetroAccess

Paratransit service that Metro provides for people with disabilities who are certified eligible to receive this service because they are unable to access Metrorail, Metrobus or other fixed-transit services


Mezzanine

The area of a Metrorail station that is near the entrance level that contains the faregate, fare vendors, and kiosk


MOC

Maintenance Operations Center, the facility from which all Metrorail maintenance activities are coordinated and monitored


MTA

Maryland Transportation Administration


Mushroom

The train operator's emergency brake control


MTPD

Metro Transit Police Department


MWCOG

Metropolitan Washington Council of Governments


NextBus

An electronic, real-time, information display system that tells customers where a bus is along the route and when it will arrive at a designated bus stop. This real-time information is accessible through Internet-connected devices.


Non-revenue hours

The hours when passenger service is not operated


Non-revenue train

Any train in test, maintenance, emergency or inspection service, which may not be used by the public


OCC

See Rail Operations Central Control


OmniRide/Omnilink

Transit systems operated by the Potomac and Rappahannock Transportation Commission (PRTC)


Operators

Individuals who are at the control of a rail car or who drive a bus: a bus operator or a rail operator


Passenger Information Display Signs

Electronic signs that provide information on the next train or bus to passengers on the Metrorail system or passengers along a NextBus bus route


Patron

A paying customer


Peak Hours

Those periods on weekdays (excluding observed holidays) normally associated with morning and evening rush hours


PIDS

See Passenger Information Display Signs


Platform

The part of a Metrorail station that is on either side of the track bed where passengers wait for trains to arrive


Portal

The point where trains enter and exit tunnels


Potomac Rappahannock Transportation Commission

The authority in charge of operating OmniRide and Omnilink in Virginia


Rail Operations Central Control

The facility in the Metro headquarters building from which train control and supervision is accomplished for the entire transit system


Rehabilitation

The process of renovating a rail car, train or bus to original specifications through a rebuilding process that may include new components, mechanical systems, and interior


Revenue

Money paid in fares


Revenue Hours

The hours when revenue trains or buses are in service


Revenue Service

The time when a rail car or bus is available to the paying public


Revenue Vehicle

A rail car or bus that is used by paying customers


The RideGuide

The service provided by Metro that informs customers of the various routes they can take to get to their desired destinations


Ride On

The Montgomery County (MD) local bus system


Rohr

Rohr Corporation, a manufacturer of rail cars


Route

The regular path or direction that a bus or train takes to get to different locations


Running rails

The two rails on which the wheels of trains travel

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S-1 Guards

Protective devices along the rear passenger-door side of buses that serve to push objects away from the rear door-side tire of a bus. They help prevent the rear wheel from running over objects that may be on the ground.


SAP

System Access and Capacity Program


SEP

System Expansion Program


Single track

The operation using only one main track for trains traveling in both directions by alternating the direction of traffic when the track is vacant


SmarTrip® Card

A permanent, rechargeable plastic farecard, like a credit card, which is embedded with a special computer chip that keeps track of the value of the card


Smoldering Insulator

An insulator along the third rail that may be giving off smoke


Station Manager

The Metro employee who oversees activity in a Metrorail station and serves as the head Metrorail official in a station. The Station Manager's Office is the kiosk located near the faregates.


Station Overrun

When a Metrorail train arrives at a platform, but the lead car in the train passes the platform


TAGS

Transportation Association of Greater Springfield


Terminal Station

The last stop along a Metrorail line or bus route


Third Rail

The high voltage rail bar along the track that carries electrical energy to run the trains on that track. The third rail voltage is approximately 750 volts. It is also sometimes referred to as a propulsion rail or contact rail.


Train Operator

The qualified Metro employee aboard a rail vehicle who has direct and immediate control of the vehicle


Truncated Domes

See Bumpy Tiles


Tunnel

The underground passageway used by Metrorail cars


USDOT

United States Department of Transportation


Vault

The underground Metrorail station's main cavity bordered by the interior walls between the station and the external rock-bed


VRE

Virginia Railway Express


WMATA

Washington Metropolitan Area Transit Authority

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