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2015 - October - Tipper - Signalling the Layout or Signalling the Tr 2015 - October - Tipper - Signalling the Layout or Signalling the Train?

Paul Tipper BSc

P.R.Tipper Pty Ltd

The conventional practice of placing signals onto a track layout to meet operational requirements often fails to achieve the aim of the operator. This is because track layouts are developed primarily around geographical constraints and do not consider the dynamics of the operational railway. Equally, signalling which is not shaped by the behaviour it imposes on the train is likely to fail in meeting the operational requirements for the same reasons.

In developing concepts for the Sydney network Sydney Trains has turned the conventional process on its head. The new process started with an analysis of the operational needs to determine the type of train and driver behaviour required to achieve them. This behaviour was then further analysed to determine the likely signalling arrangements which would facilitate that behaviour. Finally, track layouts were devised that were compatible with the signalling arrangements. These layouts were then passed on to the track team to develop into alignments compatible with the geography.


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