New Metrorail - Perth

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The New MetroRail project, with a budget of $1.518 billion, is the biggest public infrastructure project ever undertaken in the Perth metropolitan area. It will expand the existing railway network of some 100 kilometres by a further 81 kilometres of new track and will almost double the existing fleet of 96 railcars. Annual patronage is expected to grow from about 31 million to 51 million passenger trips in 2008 and 15 new stations will be built.

Significant alterations to existing structures and roadways above ground were required to accommodate the approach sections of the railway, and for the cut and cover construction of the new stations.

GHD was responsible for the:

  • Alignment and transit space analysis of the tunnels (setting the spatial and sizing arrangements);
  • Detailed design of the dive structures;
  • All trackwork and related railways, particularly the special tunnel track forms for the control of noise and vibration (which required extensive acoustic and structural modelling);
  • Rationalisation and remodelling of Perth Yard (including track layouts, signalling alterations and modifications to the OHW layout); and
  • All of the surface works for the alterations of highways, lighting, traffic controls and drainage.

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