Standard

AS 7711

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Omfang

This document specifies the principles for railway signalling systems. This document is applicable to railways covered by AS 7630. This document is not generally applicable to inclined railways, tramways and other railways to which Rail Safety National Law does not apply, however the principles within this document can be applied. This document is applicable to all aspects of the signalling system. Signalling systems comprise of various systems (e.g., train control, wayside systems, train-borne systems, etc.) including the procedures and technology that form the system of safeworking (including degraded mode working). This document is applicable to automatic train operations (ATO). Where a requirement relates to rail safety workers, the requirement equally applies to autonomous train systems. This document is applicable to all systems of safeworking regardless of the train detection systems in use. This includes systems that use mechanical interlockings, whether they are released/locked by a signalling system or managed through the safeworking system. This document is primarily designed for use with fixed block systems, where the block locations or track section boundaries are fixed either physically (e.g., signals) or virtually. Systems using moving block can apply similar principles to those described in this document, however they could require modification. Digital train control systems such as European Train Control System (ETCS) are not specifically covered by this document. However, the principles contained within can be used for guidance when designing those systems. This document does not address the processes and competences for the design, construction and implementation, commissioning, monitoring and maintenance, modification, or decommissioning and disposal of a signalling system. Each principle within this document includes: (a) Rationale – identification of risks that are mitigated through adherence with the principles; (b) Requirements (if applicable) – specific requirements needed to comply with the principles; and (c) Guidance (if applicable) – recommendations and guidance to assist in meeting the principles.

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