Absolute Block correct answers a block established between block limit signals or controlled
signals in which no train is permitted to enter while it is occupied by another train or equipment
Block correct answers A length of track of defined limits, the use of which is governed by block
limit signals, cab signals or Form M
Controlled Block correct answers the block, or series of consecutive blocks, between successive
controlled signals in Centralized Traffic Control (CTC) territory
Manual Block correct answers a length of main track between two successive block limit signals
Deadhead Trains correct answers A passenger train on which no revenue passengers are carried
Engine correct answers a unit, other than a track car, propelled by any form of energy, or a
combination of such units operated from a single control, used in train or yard service. Engines
include diesel and electric multiple unit cars.
Equipment correct answers railroad cars, engines or track cars
Extra Train correct answers a train not designated by operating schedule or bulletin order. It may
be designated either "Extra" or "Passenger Extra". The direction of travel must be included in the
designation; for example "Extra 2024 East"
Freight Train correct answers any train that is not a passenger train
Light Engine correct answers an engine consisting of one or more units without cars. Does not
apply to multiple-unit cars.
M-Series Equipment correct answers MU Passenger Cars of the M-3, M-7 or M-8 Series
, Non-Shunting Equipment correct answers equipment that may not shunt track circuits, including
a single light engine, a single MU Car or a single pair of MU Cars, track cars and equipment
indicated in the special instructions
Track Car correct answers Specialized equipment, including highway rail vehicles, operated on
track for inspection or maintenance purposes
Train correct answers multiple-unit cars coupled, or an engine, with or without cars, displaying a
marker
Blocking Device Removed (BDR) Code correct answers a computer generated, unique, random
number transmitted from the operations control center (OCC) to a Roadway Worker-In-Charge
(RWIC) before fouling a track or beginning work where CTC or Interlocking rules apply
Interlocking correct answers an arrangement of signals and appliances so interconnected that
their movements must succeed each other in proper sequence and for which interlocking rules
are in effect
Interlocking Appliance correct answers a movable apparatus within an interlocking that either
allows or prevents movements over designated routes, including switches, movable frogs, mitre
rails and derails
When is an interlocking appliance blocked? correct answers An interlocking appliance is blocked
when an approved device is applied to the control console that prevents the control for that
appliance from being operated
When is an interlocking appliance secured? correct answers An interlocking appliance is secured
when a qualified employee either applies an approved device to the appliance that prevents it
from operating, or electrically disables the appliance and mechanically locks it in the required
position