Definitions

Question 1

Interlocking

Answer 1

An arrangement of signals and signal appliances so interconnected that their movements must succeed each other in proper sequence and for which interlocking rules are in effect.

Question 2

Interlocking station

Answer 2

A place from which an interlocking is operated.

Question 3

Interlocking limits

Answer 3

The tracks between the extreme opposing home signals of an interlocking.

Question 4

Interlocking switch

Answer 4

A switch within interlocking limits controlled by the block operator or train dispatcher working in conjunction with interlocking signals and other interlocking appliances.

Question 5

Interlocking signals

Answer 5

The fixed signals of an interlocking.

Question 6

Block

Answer 6

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.

Question 7

Absolute block

Answer 7

A block established between block stations, block limit stations, interlockings or any combination thereof, which must not be occupied by more than one train except as provided by special instructions.

Question 8

Block signal system

Answer 8

A series of consecutive blocks.

Question 9

Automatic block signal system

Answer 9

A block signal system where in the use of each block is governed by automatic block signals, a cab signal indicator or both.

Question 10

Manual block signal system

Answer 10

A block signal system wherein the use of each block is governed by block signals controlled manually, block limit signals, or both upon information received by telephone, radio, or other means of communication.

Question 11

Bulletin notice

Answer 11

A notice issued to employees by the general superintendent - transportation. It may contain special schedules and other information pertaining to track work programs or special events and will be issued at a minimum of once per week.

Question 12

General notice

Answer 12

A notice issued to employees by the general superintendent transportation. It may contain operating instructions or other information as may be necessary.

Question 13

General order

Answer 13

An order issued to employees by the general superintendent transportation. It may change or annul operating rules, timetable information or special instructions.

Question 14

Schedule

Answer 14

The part of the timetable that prescribes direction, number and movement of a regular train.

Question 15

Temporary speed restriction bulletin (TSRB)

Answer 15

A daily bulletin containing necessary speed restrictions issued by the train dispatcher.

Question 16

Timetable

Answer 16

The authority for the movement of regular trains subject to the rules. It contains classified schedules and special instructions relating to the movement of trains.

Question 17

Dual control switch

Answer 17

A power-operated switch also equipped for hand operation.

Question 18

Electric lock switch

Answer 18

A hand operated switch equipped with an electrical device that restricts the movement of the switch.

Question 19

Hand operated switch

Answer 19

A switch that must be aligned by hand before a train makes a trailing point movement through the switch.

Question 20

Spring switch

Answer 20

A switch equipped with a spring mechanism that will restore the switch points to the normal position after being trailed through.

Question 21

Block-limit station

Answer 21

A place at which a block limit signal is displayed.

Question 22

Passenger station

Answer 22

A place at which trains are scheduled to receive and/or discharge passengers.

Question 23

Station

Answer 23

A place designated by name on the station pages of the current timetable.

Question 24

Block station

Answer 24

A place at which manual block signals are displayed.

Question 25

Automatic safety switch

Answer 25

A switch identified by a yellow switch stand. Trains may make trailing point moves through the switch without previously aligning it by hand unless otherwise specified.

Question 26

Crossover

Answer 26

A track connection between two adjacent not necessarily parallel tracks, consisting of a minimum of two switches, which is intended to be used primarily for the purpose of crossing over from one track to another.

Question 27

Derail

Answer 27

A track safety device, fixed or portable, designed to guide a car off the rails at a selected location on a track as means of protection against collisions and other accidents.