There will be disruptions to tram services (routes 3/3A, 5, 6, 16, 58, 64, 67 and 72), including replacement buses running on St Kilda Road and Plenty Road, while trams will not run on Flinders Street between Elizabeth and Russell streets or the city circle at various times (routes 70 and 75, City Circle).
Regional trains will be replaced by buses on parts of the Ballarat, Bendigo, Gippsland, Geelong, Traralgon, Bairnsdale and Warrnambool lines from now to early October.
Gippsland passengers have been promised free train travel because their service has been the hardest hit during upgrades and other construction work.
Public Transport Victoria advises passengers to allow more time for trips and consider alternatives to the disruptions. It urges passengers to consider working from home or avoiding peak times and travelling before 7am and after 9am.
Most of the disruption is due to work for the Metro tunnel, including upgrading signalling and building an additional platform at West Footscray station. The existing platforms at all stations between Footscray and Sunshine will be extended to allow for bigger trains for the Metro tunnel.
The east-bound lanes of Flinders Street between Elizabeth and Swanston streets are now closed to traffic for up to three years as Metro tunnel construction works starts under Flinders Street.
Trams on this section of Flinders Street will stop for six days from October 2 to 7 when major work is carried out near the tracks.
Other work includes upgrading power and signalling on Melbourne’s train network.
For full details of the disruptions visit ptv.vic.gov.au, or download RACV's arevo app to help you plan your commute.