x) operator (signaller).
A track connection between tow adjacent tracks.
The movement of trains on a main track, in one direction, specified by the rules.
A fixed signal outside of a block system, used to govern the approach to a block signal, interlocking signal or switch point indicator. It will not convey information as to conditions affecting the use of the track between the distant signal and block signal (Home Signal), interlocking signal or switch point indicator to which the approach is governed. It will be identified by a “D” marker.
A portion of the railroad designated by timetable.
Two main tracks, on one of which the current of traffic is in a specified direction, and on the other in the opposite direction.
A power-operated switch, also equipped for hand operation.
An electrically controlled lock device affixed to a hand operated switch or derail to control its use.
A unit propelled by any form of energy, or a combination of such units operated from a single control, used in train or yard service.
A train not authorised by timetable schedule. It may be designated:
- Extra: For any extra train except work extra, the movement of which is authorised in a specific direction.
- Work Extra: For an extra train authorised by Form H train order, the movement of which may be within either direction within specified limits.
A signal of fixed location indicating a condition affecting the movement of a train.
The first station on each subdivision from which a train is authorised to occupy the main track.
An arrangement of signal appliances so interconnected that their movements must succeed each other in proper sequence. It may be operated manually or automatically.
The tracks between the outer opposing absolute signals of an interlocking.
The fixed signals of an interlocking, governing trains using interlocking limits.
A track extending through yards and between stations which must not be occupied without authority or protection.
Two or more main tracks, the use of which is designated in the timetable.
A sign marking the limit of control of a block signal.
An employee assigned to a train when the engineer or conductor is not acquainted with the rules or portion of railroad over which the train is to be moved.
A station at which a train register is located.
A train authorised by timetable schedule.
A speed that will permit stopping within one half the range of vision; short of train, engine, railroad car, stop signal, derail or switch not properly lined, looking out for broken rail, not exceeding 20 MPH.
That part of a timetable which prescribes class, direction, number and movement for a regular train.
A track auxiliary to the main track for meeting or passing trains. The timetable will indicate stations at which sidings are located.
The appearance of a fixed signal conveying an indication as viewed from the direction of an approaching train; or the appearance of a cab signal conveying an indication as viewed by an observer in the cab.
The information conveyed by the signal aspect.
A main track upon which trains operate in both directions.
A switch equipped with a spring mechanism to restore the switch points to original position after having been trailed through.
A place designated in the timetable station column by name.
A portion of a division designated by timetable.
A train having precedence over another train.
A light type indicator used in connection with facing point movement over certain switches to indicate points fit properly.
The last station on each subdivision to which a train is authorised to occupy the main track.
The authority for the movement of trains subject to the rules. It may contain classified schedules and includes special instructions.
A notice containing information as to track conditions or other conditions, necessary for the safe operation of trains or engines.
A form used to authorise occupancy of main track where designated by special instructions.
Wayside detectors which are provided at various locations as shown in the timetable which detect such conditions as overheated journals (hot box