Narrows Bridge

The Narrows Bridge in Perth, Western Australia, is a freeway and railway crossing of the Swan River.

It consists of two road bridges and a railway bridge, connecting the city's northern and southern suburbs. The first road bridge was constructed in 1959 as part of the new Kwinana Freeway. It was the largest precast prestressed concrete bridge in the world at the time and considered the most modern highway in Western Australia.

Due to increased traffic, a solution was proposed in 1998 to widen the original bridge. This second bridge carried six lanes of traffic, including one bus lane, while the original bridge was modified to carry six traffic lanes as well.

During the construction of the second road bridge, the need for a railway bridge became a political issue. An agreement was made to construct a third bridge to accommodate the Mandurah railway line. The railway bridge deck was made from nine steel girders, each weighing up to 99.5 tonnes and up to 54 meters long. The first passengers crossed the Narrows on 23 December 2007 with the opening of the Mandurah line.