BRT

BRT
Initials of Brotherhood of Railrway Trainmen union.
BTU
British Thermal Unit. The amount of heat required to raise the temperature of one pound of water one degree Fahrenheit under normal conditions.

BRT Initials of Brotherhood of Railway Trainmen union Bull Slang for a railroad police officer or railroad detective.

Brotherhood Notch On steam locomotive - reverse gear hooked up nearer dead center, light throttle, thus using less steam, pulling light train - making it easier on fireman BRT Initials of Brotherhood of Railrway Trainmen union
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Block Register Territory (BRT)
Block Register Territory is typically a branch line that will normally only be occupied by one train.

See also: Point, Triple Valve, Train Line, Train Brake, Train Register