Passengers travelling on the Gippsland line face significant travel disruptions as major works continue.
Beginning last Thursday and continuing until Wednesday August 13, the works are part of the Gippsland line upgrade.
Coaches will replace trains for all or part of the journey between Southern Cross, Traralgon and Bairnsdale during the period.
A number of timetables will operate throughout the period, rotating through different day and night schedules.
At times, Traralgon line passengers will use a Metro trains service for connection to the Melbourne central business district and suburban stations along the Pakenham Line.
Bairnsdale line passengers will travel on coaches between Bairnsdale and Southern Cross.
Replacement coaches will not stop at Flinders Street, Richmond, Clayton and Berwick. Passengers wishing to use these stations should switch to a metropolitan service on the Pakenham line.
Once completed, the Gippsland line upgrade will enable extra trains to run giving passengers more travel options.
Works will include signalling construction along the line, including cabling and installing trackside signalling equipment between Drouin and Traralgon.
Safety testing of new infrastructure along the 70km stretch of rail line will also take place, along with driver training, and the complex commissioning work needed to bring the new system into operation.
Passengers are asked to allow extra time, and to plan their journey using the temporary coach timetables available on the PTV website.
The latest public transport information and network status is available at ptv.vic.gov.au