major construction commenced on 23 october 2015, beginning in the section of george street between king and market streets. to minimise disruption along the length of the corridor, works were staggered across 31 construction zones. the first section of track in the cbd was laid in december 2016, by which time a total of 410 metres of track had already been laid across the project. this increased to around 5 kilometres of track by may 2017. by october 2017, track installation reached the halfway mark, with 12,000 metres of track laid at 23 of the 31 zones along the alignment.