Railways and Tramways of Australia

Malfunction junction

 

A new Sydney Signal Box commenced operating on 23 September 1979.

 

Signalling is a vital aspect of railway operations that provides safe passage for trains. Changes in technology have seen signalling equipment and operational practices evolve. The signalling systems used today are vastly different to those in place in years gone by.

 

Prior to 1979 four signal boxes controlled all signals and points within Sydney Yard and out to Newtown and Erskineville. However, equipment was worn out and in need of renewal.

 

The new Sydney Signal Box, located on the eastern side of the railway line to the north of Redfern, brought together the functions of the four signal boxes into one control centre. Computers identified and monitored train movements. It featured a 17-metre console, which operators used to control train movements. Stopping patterns of trains were automatically sent to stations for display on platform indicators. The first stage was commissioned on 23 September 1979, with other stages completed by the end of the year. Signals and points were upgraded at the same time.

 

Major problems were experienced in the months following the inauguration of the new system. There were numerous signal failures and major delays to trains. Drivers required time to become familiar with new signalling arrangements, and signallers needed to learn the effective the operation of the new control centre. Sydney Signal Box gained the nickname ‘Malfunction Junction’. Over time these issues were resolved and the new signal box operated effectively.

 

Sydney Signal Box closed in 2018. Its functions were transferred to Homebush until the inauguration of the Rail Operations Centre the following year. Although no longer used as a signal box, the 1979 building still stands.

 

Despite the early malfunctions, Sydney Signal Box played a major role in modernising signalling operations.

 

Bibliography

‘A survey of operation in the new signalling centre at Sydney’, Railway Digest, vol. 18, no. 2, February 1980, pp 30–33.

‘Computerised signalling for Public Transport Commission’, Transport News, vol. 6, no. 4, July/August 1978, pp 7–10.

M O’Sullivan, ‘Switch finally flicked off at Sydney’s ‘malfunction junction’’, The Sydney Morning Herald, 27 July 2018,

     www.smh.com.au/national/nsw/switch-finally-flicked-off-at-sydney-s-malfunction-junction-20180724-p4ztar.html, accessed 20 September 2026.

R Howarth, G Travers & J Beckhaus, Duck the Hassle: trains, buses and ferries of the Public Transport Commission of New South Wales 1972 –

     1980, Sydney Bus Museum, 2024.

RT Taaffe, Signal boxes of New South Wales railways and tramways: volume 2-Gazetteer Illawarra, metropolitan, tramway, Taaffe Press, Hobart,

     2019.