LATEST NEWS: KiwiRail looking ahead after challenging year          More


Glossary of terms

Arrival road

A track on which trains stop on arrival at a yard

Average Haul

The (weighted) average distance freight is carried.  It is calculated as net tonne kilometres/net tonnes.

Average Gross Train Load

A measure of total average Gross weight of trains. The total average of wagon payload and wagon tare weight on trains which is calculated by total freight Gross Tonne Kilometres divided by total freight Train Kilometres

Average Net Train Load

A measure of total average Net weight of trains. The total average of wagon payload on trains which is calculated by total freight Net Tonne Kilometres divided by total freight Train Kilometres

Average Track Density

A measure of usage of a railway in density terms which is determined by Gross Tonne Kilometres divided by Route Kilometres for a given section of track

Average Train Speed

Average train speed calculated by total Train Kilometres divided by total Train Hours

AVI

Automatic Vehicle Identification

Axle load

The weight on any one axle (tonnes)

Bogie

A twin axle wheelset or "truck".

Bogie Wagon

A rail wagon with twin axle wheel sets

CEA

Collective Employment Agreement

CIMW

Coupled In Motion Weighbridge

Clearance gauge

The maximum permitted dimensions of the rail vehicle and load

Coal Route

The route of railway from Ngakawau to Rolleston in the South Island for Solid Energy and Pike River Coal – incorporating the Midland Line and the Stillwater Westport Line

Consist

The set of wagons or carriages which form the train

Controlled Network

Comprises all track where occupancy and movement by Rail Service Vehicles is under the control of KiwiRail

CTC

Centralised Traffic Control:  remote centralised control of signals and points and therefore train movements

CWR

Continuous welded rail

DART

Developing Auckland's Rail Transport Network

Daylighted

Converted from a tunnel into a cutting

DEMU

Diesel electric multiple unit; a two passenger car set in which one car is diesel electric powered

Density

A measure of the level of operating activity on a particular line (or a group of lines) expressed as millions of gross or net tonne kilometres per route kilometre per year.

Derailment

A derailment of a train that has been made up, tested and departed from the originating station.

Destressing

Heating and refastening of rail

DMU

Diesel multiple unit; a two passenger car set in which one car is diesel powered

Drawgear

Equipment used to connect wagons together

EAP

Employee Assistance Programme

ECMT

East Coast Main Trunk line between Hamilton and Kawerau

EM80

Rail vehicle that automatically records track geometry and notes exceedances.

EMU

Electric multiple unit; a two or three passenger car set in which one car is electrically powered

Flash butt welder

Welding machine used to weld lengths of rail together in situ

FLB

Flashing lights and bells

Formation

The earthworks on which the track is laid

Freight forwarding

Freight forwarding companies contract with the shipper for the complete transport task, but subcontract the line haul, after consolidation where appropriate

FTE's

Full Time Equivalent staff counts

Gauge (track gauge)

The distance between the rails on the railway track (1067mm or 3ft 6in on NZRL, 1435mm or 4ft 8½ in USA)

Gross Tonne Kilometres (GTK)

The sum of the total train weight multiplied by the distance travelled:  frequently used to mean GTK trailing

GTK trailing

Gross tonne kilometres excluding the locomotive

HAB

Half arm barriers

Heat buckling

Distortion of track alignment under high temperature condition, resulting from improper rail installation

Heritage Charter Services

A "one-off" train service organised for or by rail heritage enthusiasts, and "Heritage Operator" means rail enthusiasts organising and operating such a service.

Hi-Rail Vehicle (HRV)

A road vehicle fitted with retractable rail trolleys such that it can be driven along the track and can also be driven on or off track at level crossings or other suitable places.

Infrastructure Works Controller (IWC)

A person in charge of an infrastructure work area on the National Rail System.

Injury downtime rate

The time lost to injuries as a percentage of total hours worked.

Line haul

That part of the transport task that is between terminals (distinguishing from the aggregation and distribution at each end of the journey).

LIV

Light Inspection Vehicle (hi-rail)

Locomotive Hours

The total numbers of active Locomotive Hours whilst on trains eg two Loco's on one train for one hour is two Locomotive Hours

Locomotive Kilometres

The Locomotive Kilometres run on trains including shunting en route - two locomotives travelling one kilometre on 1 train is 2 Locomotive Km's

Lost time

A period in which an employee is unable to work

Lost time injury

An injury which causes an employee to miss at least one shift or results in the employee being away from work for at least one full working day

LTIFR (Lost Time Injury Frequency Rate)

The total number of Lost Time injuries per million hours worked.

LTNZ

Land Transport NZ, the regulator for the rail industry (formerly Land Transport Safety Authority).

Marshalling

Arranging wagons in the correct order form making up trains.

Midland Line

The East-West rail line between Greymouth and Rolleston (South of Christchurch)

MNPL

The route of railway from Marton to New Plymouth

Mobile Track Maintenance Vehicle (MTMV)

Tampers, Regulators, Spot Re-sleepering Group, Ballast Cleaner, Track Evaluation Car, Self-propelled Cranes and heavy Hi-Rail Vehicles exceeding an un-laden weight of 20 tonne.

MNL

Main North Line: route of railway from Picton to Christchurch on the South Island

MRL

Manukau Rail Link

MSL

Main South Line: The route of railway from Lyttelton to Invercargill on the South Island

MTkm

Million train kilometres

NAL

North Auckland Line: The route of railway from Westfield Auckland to Otiria in Northland.

Narrow Gauge

Distance between rails of less than 1.435 metres; in the case of the company, a gauge of 1.067 metres

National Rail System

The rail network comprising the Controlled Network and Operator Controlled Territory.  It includes all track unless specifically defined as unavailable for rail activity, owned or managed by KiwiRail (including private sidings) and all retained track.

National Rail System Standards (NRSS)

Standards adopted by KiwiRail and all operators using the National Rail System.

Net Tonne-Kilometres (NTK)

The sum of the tonnes carried multiplied by the distance travelled.

Network Controller

The party who is delegated by KiwiRail to authorise the occupancy and movement of trains and other Rail Service Vehicles, including notification of special conditions in respect of the whole or part of the Controlled Network.  This includes, where the context so requires all Network Control Managers, Train Controllers, Signal box Controllers and Network Controllers (Authorities).

NIMT

North Island Main Trunk:  the route of railway from Auckland to Wellington

OCC Log

The description of an event in the company's occurrence management system.

Operator Controlled Territory

Means all track outside the Controlled Network and forming a part of the National Rail system where an operator or other designated party is responsible for the occupancy and movement of Rail Service Vehicles.

PNGL

Palmerston North to Gisborne Line: The route of railway from Palmerston North to Gisborne

Power Van

A railcar carrying diesel powered generators to provide lighting and heating or cooling power to a passenger train

Rail lubricator

A track mounted device actuated by passing wagons to lubricate rails in order to reduce rail wear.

Railcar

A self-propelled carriage.  The term is generally only used in Toll to apply to the three Silver Fern railcars (and earlier vehicles since withdrawn).

Regulator

A track machine used to ensure an even distribution of ballast

Renewal

The replacement of an asset on a like-for-like basis.

Revenue tonne Kilometre

The weight of freight carried for hire in tonnes multiplied by the distance travelled in kilometres

RMTU

Rail and Maritime Transport Union

Rolling stock

All locomotives, railcars, wagons and carriages

Route Kilometre

One kilometre length of rail route, excluding sidings, without adjustment for double track

RTK

Revenue Tonne Kilometres used interchangeably with NTK

Siding, Terminal or Depot Controller

A person responsible for the co-ordination of Rail Service Vehicle movements in a designated siding, terminal or depot outside the Controlled Network.

Single manning

Driver only operation of freight trains

Single track

A rail route with one track, allowing traffic to move in only one direction at a time

SOL

The route of railway from Strafford (on the MNPL) to Okahukura (on the NIMT)

SPAD (Signal Passed at Danger)

Any signal, which has been passed without the correct authority or where the safe-working authority has been exceeded.

SPAD A's

A category "A" SPAD is a SPAD where a stop signal indication (and any associated preceding cautionary indications) was displayed correctly, in sufficient time for the train to be stopped safety at the signal.  Note that a "Stop Signal" also includes points indicators, notice boards (those requiring a train to stop), and Track Warrant limit over-runs.

Structure gauge

The maximum permitted dimensions of the rail vehicle and load.

TAIC

Transport Accident Investigation Commission – Crown investigation agency (separate from LTNZ)

Tamper

Mechanised rail vehicle which lifts and straightens track.

TEU's

Transport Equivalent Units - Generally a 20 foot standard container unit to ISO standards

TEU's Kim's

TEU's multiplied by distance travelled by TEU's on a individual basis. Individual calculations are summed up to arrive at total TEU Km's

TQI

Track quality index, representing a weighted sum of geometry exceedences.

Track Kilometres

Total Track Kilometres including double track ie. 1 km of double track Route Km's is 2 Track Km's

Trailing

Generally relates to NTK's and GTK's meaning that those calculations do not include the weight of the Locomotives but only the loads being towed by locomotives

Train

A single unit

Train Hours

The total number of hours of all trains from start time to finish time of trains

Train Kilometres

Total train kilometres consist of kilometres travelled by Freight Services, Passenger Services and Infrastructure Services

Trespasser

A person unlawfully on railway property (ie without proper authorisation)

TTK's

Tare Tare Kilometres which is the sum of tare weights (Weights of empty wagons) multiplied by the distance travelled - also generally the difference between NTK's and GTK's

Unit train

Any train which operates in a fixed formation between loading and unloading points, usually carrying bulk commodities such as coal, forestry or grain.

Wagon Kilometres

The total amount of wagon kilometres run over a given period both empty and full

Wagon Velocity

Total Wagon Kilometres divided by available hours of those wagons - measured in kilometres per hour

WRRP

Wellington Region Rail Project

Work Trains

Trains used for maintenance purposes and not in revenue service - generally infrastructure maintenance such as ballasting, rail renewals etc

Wrong side failure

The failure of a signal such that the indication shows "safe to proceed" when this is not necessarily correct.