Glossary of Terms


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Wagon
Used when describing or referring to rail vehicles of a specific type or group, e.g. freight wagons, service wagons, box wagons, tank wagons, flat wagons.

Preferred
Disciplines: Rolling Stock
Wagon Booking
A wagon booking is an order to move wagons on a service leg transit leg.

Regional
Disciplines: Operations
Wagon Order
An instruction to perform a movement on a wagon, documented in the form of a shunt instruction or a train consist report.

Regional
Disciplines: Operations
Walking In The Danger Zone
Walking from place to place in the Danger Zone and doing no work other than placing or removing protection for a worksite or rail traffic.

Preferred
Disciplines: ALL Disciplines
Warm Standby
Form of redundancy in which the secondary equipment is continuously operating, but is not enabled to generate outputs except in the event of a failure of the primary equipment. Results in a short period of loss of function until the system completes transfer to the secondary unit.

Regional
Disciplines: Train Control
Warning Board
A temporary speed board with the word WARNING and a speed plate attached to warn drivers of the speed at which trains are to travel over the next portion of the line which may be unsafe at normal speed.

Regional
Disciplines: Train Control, Operations
Warning Light
A light provided for warning employees of approaching trains. The warning light is illuminated when there is no train approaching.

Regional
Disciplines: Train Control
WARNING/CAUTION Handsignal
A handsignal to indicate to rail traffic crews to reduce to, and travel at restricted speed.

Preferred
Disciplines: ALL Disciplines
Wayleave
Any crossing, either overhead or underground by an electric cable, conductor or other service main being the property of a supply authority, private company or individual, is commonly referred to as a wayleave.

Preferred
Disciplines: ALL Disciplines
Wayside
Parts of the Infrastructure not directly involved in train operations but necessary for the safe and effective operation of the railway.

Preferred
Disciplines: ALL Disciplines, Infrastructure
Web
That part of the rail between the head and the foot.

Preferred
Disciplines: Infrastructure
Weekly Notice
A publication to advertise changes to, and details of, safeworking arrangements.

Regional
Disciplines: Train Control, Operations
Weekly Speed Notice
An information sheet listing temporary speed restrictions for specific locations.

Regional
Disciplines: Operations, Infrastructure
Well Wagon (or Well Car)
A flat wagon having the height above rail of the underframe/deck structure reduced between the bogies to provide additional vertical load space.

Preferred
Disciplines: Rolling Stock
Wheel Burn
A scar on the running surface of the rail caused by intense friction heating from driving wheel slippage. The flowed metal may chip out and thermal cracks may develop into a transverse defect.

Preferred
Disciplines: Infrastructure
Wheel Clearance
For a wheelset positioned on the centreline of the track, the wheel clearance is the lateral distance between one fully worn wheel flange and the adjacent new rail.

Preferred
Disciplines: Rolling Stock
Wheel Detector
A magnetic treadle which senses the presence or passage of a train wheel.

Preferred
Disciplines: Train Control
Wheel Flange
The larger, inner part of rolling stock's wheel. It is used as a means of the guidance of the train and keeping it on the track.

Preferred
Disciplines: Rolling Stock
Wheel Scale
A build up of metallic material on a wheel tread's surface.

Preferred
Disciplines: Rolling Stock
Wheel Transfer Area
The area on a crossing or points at which the wheel tread transfers gradually from one rail to another.

Preferred
Disciplines: Infrastructure
Wheel Web
The section between the wheel hub and the wheel rim.

Preferred
Disciplines: Rolling Stock
Wheelset
An assembly consisting of axle, wheels, bearings, and where applicable associated components such as brake discs, traction gears, traction motor support bearings, gearbox, etc.

Preferred
Disciplines: Rolling Stock
Wheelset Electrical Resistance
It is the resistance between the rail contact surfaces between wheels on the same axle. The electrical resistance is measured from the rail contact surface of one wheel to the rail contact surface of the other wheel via the axle of that wheelset.

Preferred
Disciplines: Rolling Stock, Electrical
Whistle
A device such as a bell, whistle, siren, horn or hooter, fitted to rail traffic to give audible warning.

Preferred
Disciplines: ALL Disciplines
Wing End (crossing)
That end of the crossing formed by the wing rails. It is the opposite to the V end.

Preferred
Disciplines: Infrastructure
Wing Rail
The rails of a crossing (on the end closest to the switch in a turnout) that are flared to allow the passage of the wheel to transfer to or from the crossing nose. Named for their resemblance to a wing in shape.

Preferred
Disciplines: Infrastructure
Wire Count
This is a count of the number of conductors terminated on each wire termination point and at every wire termination point. The count is certified against the circuit wiring diagrams and cross checked against the analysis sheets.

Regional
Disciplines: Train Control
Work Authority
A formal authority that allows rail traffic to move in either direction between specified locations.

Preferred
Disciplines: ALL Disciplines
Work group
One or more workers who function as a team  to undertake a common task in the rail corridor under the supervision of a Workgroup Supervisor and have their own prestart briefing.

Preferred
Disciplines: ALL Disciplines
Work Hardening Process
A mechanical means of increasing the hardness of susceptible steels. The most common processes employ explosives or peening particularly of manganese casting.

Preferred
Disciplines: Infrastructure
Work Instruction
Documents which describe how a process is performed.

Preferred
Disciplines: ALL Disciplines
Work Lighting
Lights fitted to allow effective and safe operation when in working mode (as opposed to when travelling). Typically fitted to infrastructure maintenance rolling stock.

Preferred
Disciplines: Rolling Stock, Infrastructure
Work Mode
When infrastructure maintenance rolling stock have their infrastructure maintenance equipment deployed or operational and are able to travel at their working speed.

Preferred
Disciplines: Rolling Stock, Infrastructure
Work On Track
The work performed in the Rail Corridor.
To perform work in the Rail Corridor.

Preferred
Disciplines: ALL Disciplines
Work On Track Authority
An authority to perform work on track. See Local Possession Authority (LPA), 'Track Occupancy Authority' (TOA) or 'Track Work Authority' (TWA).

Preferred
Disciplines: ALL Disciplines, Train Control
Work Out Of Service
To work to a suitable yard, service depot, siding or location where rolling stock can leave the running line for repair or replacement of vehicle equipment.

Preferred
Disciplines: Rolling Stock, Operations
Work Site Safety Supervisor
The worker responsible for safety and protection of personnel at a track worksite and ensuring that the site is safe for the operation of trains.

Non-preferred
Disciplines: Operations, Infrastructure
Refer to Possession Protection Officer and Protection Officer.
Alternative
Disciplines: Operations, Infrastructure
Related Term: Possession Protection Officer and Protection Officer
Work Train
An accident, ballast or breakdown train including a train delivering or collecting materials or engaged in connection with accidents, derailments, washaways or the like.
A train used in maintenance or construction activities.

Preferred
Disciplines: Operations
Worker
Refer to Rail Safety Worker.

Non-preferred
Disciplines: Operations
Related Term: Rail Safety Worker
Working Roster
The working roster contains all the work allocated to a depot in the master roster. It allocates drivers to work lines and adjusts the work to accommodate additional trains, canceled trains, training, planned leave and/or any other issues which are known at the time of posting the working roster. The working roster is issued weekly. This roster is used to determine overtime payments.

Regional
Disciplines: Operations
Working Timetable
Contains all train movements. Each service in the working timetable is generally referred to as a train or trip.

Regional
Disciplines: Operations
Worksite
A worksite is an area with defined limits that is protected so that work can be performed.

Preferred
Disciplines: ALL Disciplines
Worksite Protection
The process for ensuring the safety of personnel at a track worksite and ensuring that the site is safe for trains.

Preferred
Disciplines: ALL Disciplines
Worksite Supervisor
The worker responsible for the safety of personnel at a track worksite and ensuring that the site is safe for the operation of trains.

Preferred
Disciplines: ALL Disciplines
Refer to Possession Protection Officer and Protection Officer.
Alternative
Disciplines: ALL Disciplines
Related Term: Possession Protection Officer and Protection Officer
Wrong Road Signal
Signals used for movements in the wrong running direction on a running line.

Regional
Disciplines: Train Control, Operations
Wrong Running-direction
The direction opposite to the normal direction of travel on unidirectional lines.

Preferred
Disciplines: ALL Disciplines, Train Control
Wrong Side Failure
A failure in a system which causes a potentially dangerous situation to exist.

Preferred
Disciplines: ALL Disciplines