North Sydney, New South Wales can be divided into three periods – the first from the original opening in 1886 to 1909, when the McMahons Point line opened. The second period covers the time until the Wynyard line was opened across the Sydney Harbour Bridge in 1932, and the third until construction of the Cahill Expressway on the eastern side of Sydney Harbour Bridge and the wider closure of the system in 1962. The first part of the North Sydney tramway system was a double-track cable tramway which commenced at the original Milsons Point Ferry wharf, located where the north pylon of the Harbour Bridge
Sydney Harbour Bridge although around 1964, the former tram tunnels and station were converted for use as a carpark for the Menzies Hotel and as public parking. One of the tunnels was converted for use as a storage facility after reportedly being used by the NSW police as a pistol firing range. The Sydney Harbour Bridge requires constant inspections and other maintenance work to keep it safe for the public, and to protect from corrosion. Among the trades employed on the bridge are painters, ironworkers, boilermakers, fitters, electricians, plasterers, carpenters, plumbers, and riggers. The most noticeable maintenance work on the bridge involves painting.