Trains on the Mandurah line will be cancelled nightly between Perth Underground and Rockingham stations from Sunday, February 21.
The cancellation is to allow for work to be done on the Armadale Road to North Lake Road bridge project.
The last full line services each night will be:
• Departing Perth Underground: 10.15pm
• Departing Mandurah: 9.49pm
Trains will resume from the start of timetabled services each morning and will continue to run between Rockingham and Mandurah stations.
A replacement bus Route 909 service will run between Perth Busport (Zone A) and Rockingham while trains are cancelled.
Transperth are urging passengers to allow for extra travelling time and be aware that replacement buses may not connect with timetabled bus and train services.
The work halting the nightly service is due to finish up on Thursday, February 25.
A train replacement bus timetable will be made available via the Transperth app and JourneyPlanner.