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Warwick Allison

Principal Design Engineer, Signals, Rail Infrastructure Corporation

The Botany Line is a predominantly single track railway with a junction from the goods lines at Marrickville Junction near Sydenham, in Sydney, to Port Botany. Expansion of the port facilities and the increase in both train size and frequency is driving investment in the corridor. The initial works include partial duplication and full resignalling with control from Sydenham Signal Box. The technology proposed was for a Microlok II computer based interlocking arranged with dual redundant data links and hot standby interlocking processors driving slave Microlok cardfiles in the field in order to achieve a high level of reliability. This arrangement is to develop and prove a configuration for high reliability single processor based systems that can be utilised on a heavily trafficked suburban railway.