Glossary of Terms


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K Crossing
A crossingwork comprising two opposing noses, a running wing rail and a guard wing rail. K crossings are used in diamond crossingwork assemblies.

Preferred
Disciplines: Infrastructure
Key Locking
The locking is transmitted from the interlocking frame (or equivalent) to the signalling function to be released by means of a key. It can be applied to ground frame points or level crossings.

Overseas
Disciplines: Train Control
Key Staff
A train staff or electric staff with a key fitted permanently at one end. This key operates an annett lock.

Regional
Disciplines: Train Control
Key Switch
Special type of switch which may only be actuated by means of a special type of key.

Preferred
Disciplines: Electrical
Key Token
A type of token normally used for electric token block.

Overseas
Disciplines: Train Control
Kilometre Location
The distance in kilometres from a set point, used to identify a specific place in a section.

Preferred
Disciplines: Train Control, Operations
Kinematic Outline
A two-dimensional cross-section of the shape of a vehicle that consists of the static outline plus the maximum permitted allowance for vertical bounce upwards plus lateral and roll movements in response to a steady-state cant deficiency force at maximum permitted cant deficiency (or the maximum permitted installed cant) and dynamic movements in response to track irregularity.

Preferred
Disciplines: Rolling Stock, Infrastructure
King Lever
A lever which when operated alters the Interlocking between other levers. It is usually provided for the purpose of switching out a signal box.

Overseas
Disciplines: Train Control
Kink
A non-intentional sharp bend or curve in a rail. A kink indicates a defect.

Preferred
Disciplines: Infrastructure
Knee (crossing)
The central or narrowest part of a fabricated vee crossing at the set of wing rails.

Preferred
Disciplines: Infrastructure
Knuckle (rolling Stock)
The pivoting casting that fits into the coupling head and rotates about a vertical pin to either the open position (to engage a mating coupler) or to the closed position (when fully engaged).

Preferred
Disciplines: Rolling Stock
Knuckle (track)
The central or narrowest part of a fabricated K crossing at the set of wing rails. It corresponds to the centre position between the noses of the crossing.

Preferred
Disciplines: Infrastructure