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Demonstrate knowledge of a single line automatic signalling (SLAS)
system
Level
4
Credits
5
Purpose
People credited with this unit standard are able to: demonstrate knowledge of
the principles of a SLAS system; describe the procedures for the
management of rail vehicle movements using a SLAS system; demonstrate
knowledge of procedures for the management of SLAS contingencies; and
describe procedures for handling system failures on a SLAS section.
Subfield
Rail Transport
Domain
Rail Operations
Status
Registered
Status date
20 November 2009
Date version published
20 November 2009
Planned review date
31 December 2014
Entry information
Prerequisite: Unit 19286, Demonstrate an advanced
knowledge of railway signals; and Unit 19287,
Demonstrate knowledge of the centralised traffic control
(CTC) system for rail operations; or demonstrate
equivalent knowledge and skills.
Accreditation
Evaluation of documentation and visit by NZQA and
industry.
Standard setting body (SSB)
Competenz
Accreditation and Moderation Action Plan (AMAP) reference
0013
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Special notes
1
Assessment against this unit standard is to be carried out within the context of an
organisation operating under a current, valid Rail Licence issued in accordance with
the provisions of the Railways Act 2005. The organisation’s operating rules, codes,
and instructions, referred to in this unit standard, are those the organisation has in
place to meet the requirements of the Rail Licence.
 New Zealand Qualifications Authority 2016
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2
Legislation relevant to this unit standard includes the Health and Safety in
Employment Act 1992.
3
Definitions
Organisational procedures refer to documents that include: worksite rules, codes,
and practices, equipment operating instructions; documented quality management
systems; and health and safety requirements.
Rail vehicle refers to any flanged wheeled vehicle which uses the railway line.
Setting back in the context of this unit standard refers to:
 a movement made in a double track section which opposes the prescribed
direction of travel; or
 a movement made in a single line section that opposes the direction of travel
established upon entering the section.
Single line automatic signalling route refers to a section of single line railway where
the operation of signals is automatic except at some stations where vehicles can be
sidetracked and the crossing of rail vehicles is arranged by written instructions.
Train Control is a centre from where the movements of all trains in a specified area
are brought under the direction of a Train Control Officer.
Elements and performance criteria
Element 1
Demonstrate knowledge of the principles of a SLAS system.
Performance criteria
1.1
Terminology associated with a SLAS system is explained in accordance with
organisational procedures.
Range
block section, intermediate section, interlocked station, switch out
station, crossing station, fouling point board.
1.2
The concept of a SLAS track management system is described in accordance
with organisational procedures.
1.3
Levels of authorisation for the control of train movements within a SLAS system
are identified in accordance with organisational procedures.
Range
1.4
Train Control, signal operator.
Modes of communication between train personnel and Train Control personnel
are identified in accordance with organisational procedures.
 New Zealand Qualifications Authority 2016
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Element 2
Describe the procedures for the management of rail vehicle movements using a SLAS
system.
Performance criteria
2.1
Steps for authorising train movement through a stop signal are described in
accordance with organisational procedures.
Range
2.2
stop and stay with ‘A’ light, intermediate stop and stay,
intermediate stop and proceed.
Circumstances in which a departure signal can be passed at stop are described
in accordance with organisational procedures.
Range
Train Control personnel and locomotive engineer responsibilities –
documentation, subsequent signal displays, track examination,
safe intervals, train handover, train speed.
2.3
Signal types and aspects at crossing stations are described in accordance with
organisational procedures.
2.4
Methods used to arrange a rail vehicle crossing at a SLAS crossing station are
described in accordance with organisational procedures.
2.5
Restrictions on setting back in a SLAS section are described in accordance with
organisational procedures.
2.6
Operation of switch-locked sidings is described within the context of the SLAS
system.
Range
2.7
Actions to take in the event of a train being divided on a SLAS section are
described in accordance with organisational procedures.
Range
2.8
‘A’ contact handle, indicator position/aspect, ‘B’ lever, positioning
of rail vehicles.
accidental, planned.
Steps for amending SLAS operating instructions are described in accordance
with organisational procedures.
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Element 3
Demonstrate knowledge of procedures for the management of SLAS contingencies.
Performance criteria
3.1
Means of assisting a disabled rail vehicle in a section of a SLAS route are
described in accordance with organisational procedures.
Range
3.2
Actions to take in response to a SLAS section being obstructed by a hazardous
event are described in accordance with organisational procedures.
Range
3.3
incident, disabled train with no following train, disabled train with
following train, stalled train.
hazardous events may include but are not limited to – flood,
landslip, subsidence, vehicle(s) on the track, acts of malice.
Steps for the protection of an accident or obstruction site on a SLAS section are
described in accordance with organisational procedures.
Element 4
Describe procedures for handling system failures on a SLAS section.
Range
signal systems failure, communication systems failure, switch-lock failure.
Performance criteria
4.1
The description is consistent with organisational procedures.
4.2
The description is consistent with the type of system failure.
4.3
The description outlines a method for advancing rail vehicles and implementing
an alternative safe working system.
Please note
Providers must be accredited by NZQA, or an inter-institutional body with delegated
authority for quality assurance, before they can report credits from assessment against
unit standards or deliver courses of study leading to that assessment.
Industry Training Organisations must be accredited by NZQA before they can register
credits from assessment against unit standards.
Accredited providers and Industry Training Organisations assessing against unit standards
must engage with the moderation system that applies to those standards.
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Accreditation requirements and an outline of the moderation system that applies to this
standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The
AMAP also includes useful information about special requirements for organisations
wishing to develop education and training programmes, such as minimum qualifications for
tutors and assessors, and special resource requirements.
Comments on this unit standard
Please contact Competenz info@competenz.org.nz if you wish to suggest changes to the
content of this unit standard.
 New Zealand Qualifications Authority 2016