complete solution
A block signal system wherein the use of each block is governed by block signals controlled
manually, by block-limit signals or both, upon information received by telephone, radio or
other means of communication.
Manual Block Signal System
A train given precedence in the direction specified as between opposing regular trains.
Train of Superior Direction
A system so arranged that its operation will automatically result in the following: A full
service application of the train brakes if while operating under a speed restriction, the
speed of the train exceeds the predetermined rate. The application will continue until the
train is either brought to a stop or, under the control of the engineer, its speed is reduced to
the predetermined rate.
Automatic Speed Control System
Equipment capable of being propelled by electrical energy through the use of third rail
contact shoes.
Multiple Unit Equipment
The tracks between the extreme opposing home signals of an interlocking.
Interlocking Limits
The appearance of a fixed signal which conveys an indication as viewed from the direction
of an approaching train; the appearance of a cab signal indicator as viewed in the engine
control compartment.
Aspect
A block signal system wherein the use of each block is governed by an automatic block
signal, the cab signal indicator or both.
Automatic Block Signal System
A fixed signal indicating the limit of the block, the use of which is governed by manual
block signal system rules.
block-limit signal
A train authorized by a timetable schedule.
Regular Train
A signal indicator located in the engine control compartment displaying the maximum
speed for the movement of the train. It will be used in conjunction with interlocking signals
and either in conjunction with or in lieu of block signals.
Cab signal indicator
a fixed signal used to govern the approach to a home signal.
Distant Signal
A series of consecutive blocks.
block signal system
A signal of a fixed location indicating a condition which affects the movement of a train.
Fixed Signal
When reporting for duty, employees whose duties require coordination with other
employees must hold a job briefing to review operational and safety conditions. If these