- ADVANCED TRAIN DISPATCHING SYSTEM
- Train control technologies that provide enhancements for protecting overlapping authorities with ability to provide signal indications into protected track.
- ADVANCE SIGNAL
- A fixed signal used in connection with one or more signals to govern the approach of a movement to such signal.
- AUTOMATIC BLOCK SIGNAL SYSTEM (ABS)
- A series of consecutive blocks in which ABS rules apply.
- BLOCK
- A length of track of defined limits, the use of which by a movement is governed by block signals.
- BLOCK SIGNAL
- A fixed signal at the entrance to a block to govern a movement entering or using that block.
- CAUTIONARY LIMITS
- That portion of the main track or main tracks within limits defined by cautionary limit sign(s).
- CENTRALIZED TRAFFIC CONTROL SYSTEM (CTC)
- A system in which CTC rules apply.
- CONTROLLED BLOCK
- A block in CTC between consecutive controlled locations or points.
- CONTROLLED LOCATION
- A location in CTC the limits of which are defined by opposing controlled signals.
- CONTROLLED POINT
- A signal location in CTC consisting of controlled signal(s) in one direction only.
- CONTROLLED SIGNAL
- A CTC block signal which is capable of displaying a Stop indication until requested to display a less restrictive indication by the RTC .
- CROSSOVER
- A track joining adjacent main tracks, or a main track and another track.
- DAILY OPERATING BULLETIN (DOB)
- A document containing applicable information from each GBO , instructions and other information requiring compliance within limits indicated in special instructions.
- ELECTRONIC COMMUNICATIONS METHOD (ECM)
- An electronic method for transmission and cancellation of authorities, instructions or information.
- ENGINE
- A locomotive(s) operated from a single control or a cab control car, used in train, transfer or yard service.
- ENGINE IN YARD SERVICE
- An engine with or without cars utilized exclusively in switching, marshalling, humping, trimming and industrial switching.
- EQUIPMENT
- One or more engines and/or cars which can be handled on their own wheels in a movement.
- EXCLUSIVE TOP
- A TOP that provides exclusive occupancy of the track to one foreman. No more than two track units can operate within the limits of an Exclusive TOP.
- EXCLUSIVE TRACK UNIT SPEED
- When protected by an Exclusive TOP, it is a speed that permits a track unit to stop short of a switch not properly lined.
- FIXED SIGNAL
- A signal or sign at a fixed location indicating a condition affecting the operation of a movement.
- FOLLOW-UP TOP
- A TOP issued within limits of a movement(s) that has passed or will be identified by the foreman as having passed the foreman’s location.
- GENERAL BULLETIN ORDER(S) (GBO)
- Instructions regarding track condition restrictions and other information that affect the safety and operation of a movement.
- GRADE CROSSING
- Any location where a railway track intersects with an authorized road, sidewalk, path, or trail, excluding Railway Company Grade Crossings.
- GRAVITY DROP
- Releasing stationary equipment and permitting it to roll under its own momentum.
- HEAVY GRADE
- A portion of a track 2 miles in length or greater, with an average grade greater than 1.0%, and less than or equal to 1.8%.
- HIGH RISK LOCATION
- A track, or portion of a track, other than a main track, subdivision track, or siding; identified in special instructions, on which unattended equipment requires the application of Rule 112(a).
- HUMPING
- Pushing equipment at a regulated speed then releasing it under its own momentum, in an engineered environment where the route and speed are controlled through automated or assisted devices.
- INTERLOCKING
- An arrangement of interconnected signals and signal appliances for which interlocking rules and special instructions are in effect.
- INTERLOCKING LIMITS
- The tracks between the extreme or outer opposing interlocking signals of an interlocking.
- INTERLOCKING SIGNAL
- A fixed signal at the entrance to or within interlocking limits to govern the use of the routes.
- KICKING
- Pushing equipment then releasing it under its own momentum. Does not include humping.
- MAIN TRACK
- A track of a subdivision extending through and between stations governed by one or more methods of control upon which movements, track units and track work must be authorized.
- MARKER
- When used, will indicate the last piece of equipment in a movement. It will be one of the following:
- a red light, a red reflectorized plaque, a sense and braking unit (SBU), or an occupied caboose, distributed power remote locomotive consist or distributed braking car, when the last piece of equipment in the direction of travel.
- METHOD OF CONTROL
- Rules and/or special instructions governing the use of a track(s).
- MOUNTAIN GRADE
- A portion of a track 2 miles in length or greater, with an average grade greater than 1.8%.
- MOVEMENT(S)
- The term used in these rules to indicate that the rule is applicable to trains, transfers or engines in yard service.
- MULTI-TRACK
- Two or more main tracks of a subdivision at the same location.
- NON-MAIN TRACK (NMT)
- Any track(s) other than those listed in time table columns as having CTC , OCS , ABS or Cautionary Limits applicable and unless otherwise provided include a requirement to operate at REDUCED speed.
- NON-SIGNALLED SIDING
- A siding where non-main track rules apply, the use of which may be governed by special instructions.
- OCCUPANCY CONTROL SYSTEM (OCS)
- A system in which OCS rules apply.
- RAILWAY COMPANY GRADE CROSSING
- Any location where a railway track intersects with a road, sidewalk, path, or trail, that is opened or maintained by a railway company that is the sole authority of the crossing.
- RUNNING SWITCH
- Pulling equipment then releasing it under its own momentum.
- SCHEDULE
- Information pertaining to the operating times of a passenger train.
- SIDING
- A track adjacent and connected to the main track which is so designated in the time table, GBO or operating bulletin.
- SIDING CONTROL TERRITORY (SCT)
- Non-signalled sidings indicated in special instructions where SCT rules are applicable.
- SIGNAL INDICATION
- The information conveyed by a fixed signal.
- SIGNALLED SIDING
- A siding where CTC rules apply.
- SINGLE TRACK
- One main track on a subdivision at a location.
- STATION
- A location identified by a station name sign and designated by that name in the time table.
- SUBDIVISION
- Railway trackage designated by time table.
- SUBDIVISION TRACK
- A Non-Main Track so indicated in the time table method of control column that is an extension of the main track, and the through track at that location, defined with subdivision mile posts.
- TABULAR GENERAL BULLETIN ORDER (TGBO)
- A document specific to a movement, containing applicable information from each GBO , instructions and other information requiring compliance within limits indicated in the TGBO .
- TIME TABLE
- The special instruction that contains subdivision description information and footnotes relating to the operation of movements and track units. Time table may contain information applicable on other tracks.
- TRACK OCCUPANCY PERMIT (TOP)
- Authority issued for the protection of track units and track work.
- TRACK UNIT SPEED
- A speed that;
- (a) permits a track unit to stop within one-half the range of vision of equipment or a track unit; (b) permits a track unit to stop short of a switch not properly lined or any obstruction or track defect that may prevent safe passage; and (c) does not exceed maximum authorized speed for that track unit.
- TRACK UNIT (TU)
- A vehicle or machine capable of on-track operation utilized for track inspection, track work and other railway activities when on a track.
- TRACK WORK
- Any work on or near the track that may render the track unsafe for movements at normal speed or where protection against movements may be required for employees and machines involved in track construction and repairs.
- TRAILING END
- The tail end of the last piece of equipment in a movement in the direction of travel.
- TRAIN
- An engine with or without cars intended to operate on the main track at speeds in excess of 15 MPH or a track unit when so designated.
- TRAIN INFORMATION BRAKING SYSTEM (TIBS)
- A system with rear and front communication components capable of:
- (i) monitoring and displaying brake pipe pressure on the rear car; (ii) calculating and displaying distance measurement; (iii) initiating an emergency brake application at the rear of the train from the controlling locomotive.
- TRANSFER
- An engine with or without cars operating on main track at speeds not exceeding 15 MPH .
- UNATTENDED
- When an employee is not in close enough proximity to take effective action.
- YARD
- A system of non-main tracks, utilized to switch equipment and for other purposes over which movements may operate subject to prescribed signals, rules and special instructions.