Work will start on the expansion of the Kwinana Station car park next week.
Scaffolding put up at Fremantle Station this week signals the start of the next stage of conservation works for the station.
Trains services have resumed on the Mandurah and Joondalup lines.
Perth Underground and Esplanade Stations were evacuated this morning when clouds of foul-smelling smoke rolled through the underground stations.
A Transperth bus has rolled over in Wattle Grove.