Absolute Block A block that may be occupied by only one train at a time.
A color light color positon light or semaphore signal with-
out a number plate a "P" marker, "APP" marker "C" marker
Absolute Signal
or "G" marker that conveys stop as its most restrictive
indication.
A railroad crossing at grade it is protected by signals which
Automated Railroad Crossing
are actuated automatically by the approach of a train.
A block signal that is activated either by track circuit or
in conjunction with interlocking or controlled point circuit
Automatic Block Signal
this block signal automatically indicates track condition
and block occupancy.
A series of consecutive blocks whose use is governed
by train actauted block signals or by certain conditions
Automatic Block Signal, ABS
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 signals
Block 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
Block signal
to govern use of the block.
A hand operated switch equiped with a pripe-connected
Bolt lock switch locking device that is designated to shunt the signal sys-
tem before the switch points are operated.
A train dispatching system (CTDS)is a system
Centralaized
by which train and on track equipment movements are
, 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 light
Color light signal 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
Color position lights it consists of a cluster of colored lights normally
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 op-
Control station erated it is also a place from which instructions governing
railroad movements are issued.
A station designated in the the timetable where signals are
Controlled point
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.
A fixed signal at the entrance of a route or block it is used
Controlled signal to govern the movement of trains using that route or block
the signal is operated from a control station.
is a speed that will permit within
one- half the range of vision it will also permit stopping
Controlled Speed, TCOOS
short of a Train, Car, Obstuction, On track equipment, or
Stop signal. Take Control Over Our Speed or .
is a track upon which all movements
Controlled track
will be authorized by a train dispatcher.
A combination of two switches connecting two adjacent
Crossover
tracks.
Tonnage, special, clearance, radio
, CSX train documentation is a computer generated form
consisting of some or all of the following:
graph, restricted and handling, CT-168 re-
port, bureau instructions, train listing and haz-
ardous endorsement, hazardous special handling instruc-
tions, hazardous material, waybill form.
of is the movement of trains on a
Current, traflc main track in one direction as a specified in the rules or
special instructions.
Track warrant where the specified limits are designated by
DCS track warrant
form EC-1 authority.
A Dispatcher is a computer generated form
issued by the train dispatcher it contains current oper-
bulletin ating instructions applying to the train addressed it also
contains information as to the latest systems and general
bulletins issued.
Instructions and mandatory directives issued by the train
dispatcher in a the prescribed form when applicable it
dispatcher message
governs the operaions of trains and is part of a dispatcher
bulletin.
A block whose use is governed by verbal authority of the
DTC block
train dispatcher.
The prescribed from used when obtaining a DTC track
DTC block form
warrant.
A direct traflc control block or a series of consecutive DTC
DTC block system
blocks.
Track warrant where the specified limits are designated by
DTC track warrant
block authority.