Trams in Sydney Milsons Point wharf and connecting tramway. Services to Lane Cove and Chatswood were altered to operate to and from McMahons Point via the new direct route to Crows Nest. In conjunction with the construction of the Sydney Harbour Bridge, the Milsons Point line was diverted to a new terminus in Glen Street in July 1924. Escalators were provided to carry tram passengers to the new ferry wharf below. Otherwise, services operated as during the first period. In March 1932 the Sydney Harbour Bridge with its associated railway and tramway tracks was opened and all of the above services to and
Sydney Harbour Tunnel to Sydney Harbour. A trench was dredged before the arrival of the IMTs and then the IMTs were lowered into the trench by a system of pontoons and control towers. After the IMTs were in place the trenches were backfilled and then a rock armour was placed over the top to protect the units against marine hazards, such as anchors or sinking vessels. The land tunnels were constructed by a combination of driving and cut-and-cover techniques, designed to be strong enough to withstand the impact of earthquakes. The northern end pylons of the Sydney Harbour Bridge were altered to allow