UEERS0020 — Apply rail signalling principles

Elements & performance criteria

Performance evidence

• reading and interpreting relevant railway signalling standards and procedures
• reading a signal arrangement plan and identifying the signal equipment and its location on the rail network
• reading a signalling circuit drawing and identifying the equipment type
• using relevant standard nomenclature to identify basic signalling functions associated with signals, track circuits and point machines
• identifying the relevant technical records and documentation for construction and maintenance activities
• applying rail safe working practices and relevant industry standards, codes and rail safety regulations
• identifying relevant requirements for maintenance and construction signalling activities, including:
• work health and safety (WHS)/occupational health and safety (OHS)
• signalling safety practices and principles when working on signalling circuits
• workplace procedures and practices
• risk control measures

Knowledge evidence

• relevant industry standards for railway signalling and where they can be accessed
• purpose and importance of signalling standards
• the scope of AS7711 Signalling Principles
• the role of the rail regulator and investigation organisations
• rail safety legislative requirements
• train dynamics including:
• types of rail vehicles, including suburban/country passenger, freight, maintenance vehicles and heritage/tourism
• braking distance
• gradients/terrain
• sighting distance
• essentials of safe movement of trains including:
• the role of the signalling system in enabling safe and efficient movement of trains
• standard operating conditions as per operating timetable/schedule
• purpose of rail signalling including:
• safe distances between rail vehicles
• safe movement of rail vehicles
• conflicting movement between rail vehicles
• how the signalling system provides driver information
• how the driver interprets the information to safely control a train
• restrictions on the signaller and driver following an operation error, including signals passed at stop, driver exceeding speed requirement and signaller setting incorrect route
• railway signalling principles, including:
• maintaining a safe distance between trains on the same track to prevent a collision with a preceding train
• preventing conflicting signal movements including vehicles entering a single line from opposing directions
• safeguarding the movement of trains at points and crossings and ensuring no conflicting movements at junctions
• maintaining the route set during the passage of a train
• regulating the passage of trains according to the service density and speed required
• identification and purpose of signalling equipment including:
• signals, point machines, interlockings, train detection, level crossings, power supplies, signal control panels, non-vital telemetry, wayside protection systems
• signal plans and nomenclature
• railway signalling practice principles:
• the purposes and role of independence when changing the configuration of signalling
• that only signalling design documentation that has been approved can be used
• the purpose of applying standards and procedures for all work
• the purpose of recording the results of work activities
• the purpose of railway signalling documentation version control
• the signalling equipment is tested to ensure it performs to the design
• signalling systems design safety characteristics including:
• a failure of an item of equipment will only result in a safe state for the rail system (Failsafe)
• design of the equipment and the circuits protects against a single failure and ensures a safe state.

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Questions about assessing UEERS0020