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Terms in this set (246)
A block that may be occupied by only one train at a
Absolute Block
time.
A color light color positon light or semaphore signal
without a number plate a "P" marker, "APP" marker "C"
Absolute Signal
marker or "G" marker that conveys stop as its most
restrictive indication.
A railroad crossing at grade it is protected by signals
Automated Railroad
which are actuated automatically by the approach of
Crossing
a train.
A block signal that is activated either by track circuit
or in conjunction with interlocking or controlled point
Automatic Block Signal
circuit this block signal automatically indicates track
condition and block occupancy.
A series of consecutive blocks whose use is governed
Automatic Block Signal, by train actauted block signals or by certain
ABS conditions affecting the use of a block is called an
___________ __________ _________ system or (___).
Auxiliary track A track other than a main track.
, A track section of defined limits in signaled territory a
block is the track section between two consecutive
Block block signals geverning movements in the smae
direction it is also the track section from a block signal
to the end of signaled territory.
A fixed signal displayed to trains at the entrance of a
Block signal
block to govern use of the block.
A hand operated switch equiped with a pripe-
connected locking device that is designated to shunt
Bolt lock switch
the signal system before the switch points are
operated.
A __________train dispatching system (CTDS)is a system
by which train and on track equipment movements are
Centralaized
governed by a controlled signals and or instructions
of a train dispatcher from a centrailized location.
A fixed signal that displays aspects by the color of
Color light signal light it may also display aspects by a combination of
colored lights.
A ________ ________ light signal is a fixed signal that displays
aspects by the color or position of two or more lights
it consists of a cluster of colored lights normally
Color position
displayed in pairs for some aspects an additional
white or yellow light is displayed above or below the
cluster.
A place from which signals and signal aplliances are
Control station operated it is also a place from which instructions
governing railroad movements are issued.
A station designated in the the timetable where
Controlled point signals are remotely controlled from the control
station.
A siding equipped with controlled signals such signals
Controlled siding
authorize trains to enter or leave the siding only.