encyclopedia

FLAG

Devices used for relaying hand signals or to restrict operations. Flags may be made of cloth, metal or other suitable material or may be a light during hours of reduced visibility, darkness or in underground sections.

FLAG DROP CHARGE

The charge for an initial distance (usually specified by regulation) for taxi service. It is actually the minimum fare. (TRB)

FLAG PROTECTED AREA (WORK ZONE)

Flags/lights placed by work crews for protection whenever working within 10 feet of centerline of track.

FLAG STOP SERVICE

1. In paratransit operations, a service accessed by hail. 2. In rail operations, a nonscheduled stop that may be served if property notice is given by a passenger or prospective passenger. (TRB)

FLAGGER

Person designated to provide flag protection for a work party on the right-of-way.

FLAME WAR

A heated and emotional debate online where polity is ignored.

FLANGE

Portion of railroad wheel which projects below the rail and guides the wheel along the top of the rail.

FLANGER

Plow for removing snow and ice from between rails. Can be an attachment to a locomotive or a special car.

FLASHER

In rail systems, the flashing light at railroad grade crossings that warns motorists, bicyclists, and pedestrians of approaching trains. (TRB)

FLAT CAR

An un-powered, non-revenue vehicle operating on tracks, moved by a powered vehicle and used to assist with on-track maintenance or other purposes.