In the project's biggest milestone to date, the first of two tunnel boring machines has now begun its 8km underground journey from Forrestfield to Bayswater.
On Sunday 30 July Premier Mark McGowan launched TBM Grace to mark the start of tunnelling.
With the first tunnel boring machine launching soon, the project has kicked into full swing.
On Tuesday 27 June Transport Minister Rita Saffioti announced the winners of the TBM competition.
On Sunday 18 June Premier Mark McGowan and Transport Minister Rita Saffioti released artist impressions for Belmont Station and surrounds.