Glossary Terms Flashcards
(20 cards)
Absolute Signal
A block or interlocking signal without a number plate, or
designated by an A marker
Absolute Signal
A block or interlocking signal without a number plate, or
designated by an A marker
Automatic Block Signal System (ABS)
A series of consecutive blocks governed by block
signals, cab signals, or both. The signals are activated
by a train or by certain conditions that affect the block
use
Automatic Block Signal System (ABS)
A series of consecutive blocks governed by block
signals, cab signals, or both. The signals are activated
by a train or by certain conditions that affect the block
use
Block
A length of track:
• between consecutive block signals.
• between a block signal and the end of block system
limits.
or
• in ATC limits the use of which is governed by cab
signals and/or block signals.
Block
A length of track:
• between consecutive block signals.
• between a block signal and the end of block system
limits.
or
• in ATC limits the use of which is governed by cab
signals and/or block signals.
Block Signal
A fixed signal at the entrance of a block that governs
trains entering and using that block.
Block Signal
A fixed signal at the entrance of a block that governs
trains entering and using that block.
Block System
A block or series of consecutive blocks within ABS, ACS,
CTC, or interlocking limits.
Block System
A block or series of consecutive blocks within ABS, ACS,
CTC, or interlocking limits.
Centralized Traffic Control (CTC)
A block system that uses block signal indications to
authorize train movements.
Centralized Traffic Control (CTC)
A block system that uses block signal indications to
authorize train movements.
Clearance Point
The location closest to a switch where it is safe for
equipment, and a person riding the side of equipment
unless prohibited, to pass equipment on an adjacent
track.
Clearance Point
The location closest to a switch where it is safe for
equipment, and a person riding the side of equipment
unless prohibited, to pass equipment on an adjacent
track.
Conductor
Crew member in charge of train or yard crew.
Conductor
Crew member in charge of train or yard crew.
Control Point
The location of absolute signals controlled by a control
operator.
Control Point
The location of absolute signals controlled by a control
operator.
Current of Traffic
The movement of trains in one direction on a main track,
as specified by the rules.
Current of Traffic
The movement of trains in one direction on a main track,
as specified by the rules.
Double Track
Two main tracks where the current of traffic on one track
is in a specified direction and in the opposite direction
on the other.
Double Track
Two main tracks where the current of traffic on one track
is in a specified direction and in the opposite direction
on the other.
General Track Bulletin
A notice containing track bulletin restrictions and other
conditions affecting train movement.
General Track Bulletin
A notice containing track bulletin restrictions and other
conditions affecting train movement.
Interlocking
Signal appliances that are interconnected so that
each of their movements follows the other in a proper
sequence. Interlockings may be operated manually or
automatically
Interlocking
Signal appliances that are interconnected so that
each of their movements follows the other in a proper
sequence. Interlockings may be operated manually or
automatically
Interlocking Limits
The tracks between outer opposing absolute signals of
an interlocking.
Interlocking Limits
The tracks between outer opposing absolute signals of
an interlocking.
Main Track
A track extending through yards and between stations
that must not be occupied without authority or
protection
Main Track
A track extending through yards and between stations
that must not be occupied without authority or
protection
Multiple Main Tracks
Two or more main tracks that are used according to the
timetable.
Multiple Main Tracks
Two or more main tracks that are used according to the
timetable.
Proceed Indication
Any block signal indication that allows a train to proceed
without stopping.
Proceed Indication
Any block signal indication that allows a train to proceed
without stopping.
Trackside Warning Detector
A device that indicates conditions such as overheated
journals, dragging equipment, excess dimensions,
shifted loads, high water, or slides.
Trackside Warning Detector
A device that indicates conditions such as overheated
journals, dragging equipment, excess dimensions,
shifted loads, high water, or slides.
Track Warrant Control (TWC)
A method to authorize train movements or protect men
or machines on a main track within specified limits in a
territory designated by the timetable.
Track Warrant Control (TWC)
A method to authorize train movements or protect men
or machines on a main track within specified limits in a
territory designated by the timetable.
Yard
A system of tracks, other than main tracks and sidings,
used for making up trains, storing cars, and other
purposes.
Yard
A system of tracks, other than main tracks and sidings,
used for making up trains, storing cars, and other
purposes.
