Flinders Street A was located at the western end of the station, between the lines to St Kilda/Port Melbourne and Spencer Street, and controlled all traffic from the west. It was of "traditional" Victorian Railways design, in brick, and had two mechanical lever frames of equal size, totalling 280 levers. The mechanical signals were decommissioned in October 1979. The signal box has been burnt twice, the second time being in 2002, destroying the timber and glass superstructure and slate roof. In 2009, it was rebuilt as "Signal", a youth arts centre funded by the City of Melbourne.