Definitions Flashcards
Absolute block
A blog established between blocks stations, Block limit stations, interlocking’s or any combination thereof which must not be occupied by more than one train except as provided by the rules
Block
A length of track of defined limits the use of which is governed by block signals, block limit-signals, automatic speed control or any combination thereof.
Automatic block signal system
A block signal system wherein The use of each block is governed by an automatic block signal, the cab signal indicator or both.
Block signal system
A series of consecutive blocks
Manual block signal system
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.
Automatic speed control system (ASC)
A system so arranged that it’s operation will automatically result in the following:
A full service application of the train breaks if, while operating under a Speed restriction, the speed on the train see the predetermined rate. The application will continue until the train is either brought to a stop or, under the control of the engineer, it’s speed is reduced to the predetermined rate.
Speed controlled train
A train equipped with the following speed control apparatus,
A cab signal indicator
Sealed application valve or switch
Audible warning device and acknowledging switch in operative condition for the direction in which it is to move.
Engine
Our unit propelled by any form of energy or a combination of units operated from a single control, used in road or yard service.
Multiple unit equipment
Equipment capable of being propelled by electrical energy through the use of third rail contact shoes
Track Car
A roadway maintenance machine, not classified as an engine, which is operated on track for inspection or maintenance. It may not shunt track circuits or operate signals and will be governed by rules and special instructions for trains other then passenger trains.
Interlocking
An arrangement of signal appliances so interconnected that their movements must succeed each other in proper sequence and for which interlocking rules are in effect.
Interlocking limits
The tracks between the extreme opposing home signals of an interlocking
Pilot
An employee assigned to a train or track car when the engineer, conductor retard or track car driver is not qualified on the physical characteristics or rules of the railroad or portion of the railroad over which the movement is to be made.
Aspect
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.
Block-limit signal
A fixed signal indicating the limit of the block, the use of which is governed by manual block signal system rules.
Block signal
A fix signal or a hand signal in the absence of a fix signal, at the entrance to a block that governs trains using that block.
Cab signal indicator
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.
Distant signal
A fix signal used to govern the approach to a home signal.
Fixed signal
A signal of a fixed location indicating a condition which affects the movement of a train
Home signal
A fix signal that displays stop as its most restrictive aspect and governs the entrance to a route or block.
Indication
The information conveyed by the aspect of a signal.
Interlocking signal
The fixed signal of an interlocking.
Marker
A highly visible markings device in the red-orange-amber color range, affixed to the rear of the train to indicate that the train is complete.
Defective locking device
A switch padlock used in relation to a manually operated switch or D rail that is vandal resistant; tamper-resistant; and capable of being locked and unlocked only by the class, craft or group of employees for whom the protection is being provided.
Defective securing device
Avendell and tamper-resistant device applied to a manually operated switch or do you out for the protection of roadway workers. This device must be secured, uniquely tagged and removed only by the class, craft or group of employees for whom the protection is being provided.
Flagman
When used in relation with the roadway worker safety, and employee assigned to direct or restrict the movement of trains passed a point on a track to provide on track safety for roadway workers, while engaged solely in performing that function.
Foul time
A method of establishing working limits on a main track, secondary track or siding in which a roadway worker is notified by the train dispatcher through the block operator that no trains will operate with in the working limits established on that track until the roadway worker reports clear of the track.
Inaccessible track
A method of establishing working limits on tracks not controlled by the train dispatcher or block operator by physically preventing the entry and movement of trains.
Job briefing
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 conditions change, employees must hold an additional job briefing to discuss the new conditions.
Roadway worker
An employee of the railroad, or of a contractor to a railroad, whose duties include inspection, construction, maintenance or repair of railroad track, bridges, roadway, signal and communication systems, electric traction system, roadway facilities or roadway maintenance machinery on or near or with the potential of fouling a track and flagmen and Watchmen/lookouts responsible for their protection.
