Cab Signals
Lights on a control panel in front of operator which indicate condition of track ahead of his train.
Cab Unit ...
A system of cab signals and other safety features for which specially equipped locomotives are required. If a train exceeds the permissible speed for a given signal indication, the brakes are automatically applied.
Automatic Train Stop (ATS) ...
Automatic Block Signal System (ABS) A series of consecutive blocks governed by block signals, cab signals or both, actuated by a train, engine or by certain conditions affecting the use of a block.
ARU American Railway Union, Crushed during the Pullman strike in 1894 Automatic Block Signal System (ABS) A series of consecutive blocks governed by block signals, cab signals or both, actuated by a train, ...
Cab Signals
Rules or Instructions
Any combination of the above Block Signal A fixed signal at the entrance of a block to govern trains entering and using that block.
Cab signals may either augment existing lineside signals or replace them.
The manipulation of automatic and/or cab signals and power operated switches from a central location where signals supersede the superiority of trains.
Circuit, track.
Block A length of track between consecutive block signals or from a block signal to the end of block system limits, governed by block signals, cab signals or both.
Some locomotives are equipped to display cab signals. These display signal indications through patterns of lights in the locomotive cab.
An interesting note about the crossing at Kensington, the overhead wires sometimes play havoc on units equipped with cab signals.
A series of consecutive blocks governed by block signals, cab signals, or both, actuated by a train or engine, or by certain conditions affecting the use of a block.
Automatic Brake Valve ...
CTC-Centralized Traffic Control. The manipulation of automatic and/or cab signals and power operated switches from a central location where signals supersede the superiority of trains.
 See also: Operation, Track, Engine, Section, Block
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