Coaches will replace trains from Saturday 28 April until the last service on Tuesday 1 May.
The coaches will travel between Southern Cross and Ballarat/Wendouree Stations. Maryborough trains will connect with coaches at Ballarat Station.
Maintenance work will also be undertaken between Ararat and Ballarat, meaning coaches will replace trains from Wednesday 2 May until Tuesday 8 May.
During this time, passengers travelling from Melbourne to Beaufort and Ararat can catch a train to Ballarat before connecting with a coach. Coaches from Ararat will stop all stations to Ballarat, then travel to Melbourne.
Shutting the lines will mean crews can finish works to enable track duplication from Caroline Springs to Melton.
View these and other disruptions that may impact your travel on the interactive map.