Disruptive works will continue on the Sunbury train line throughout the next month, as new substations are added Diggers Rest, St Albans and Diggers Rest.
The works will require train replacement buses from 8.30pm on Sunday, February 21 to the last train on Sunday, February 27.
Passengers may also need to use train replacement buses from Monday, February to Wednesday, March 2, as works disrupt parts of the line.
Crews will be tasked with installing high-voltage cables between substations to power the train line as it develops.
By 2023, the state government aims to have added longer platforms and upgraded tracks as part of the Sunbury Line Upgrade project.
The construction effort is expected to complement the Metro Tunnel opening in 2025, which the state government estimates will allow the train line to accommodate a further 113,000 in peak travel times each week.
On Gap Road, crews continue to work on the level crossing removal project, with the job expected to be completed before the end of the year.
“These works will transform the way we travel in the north-west – with better connections, slashed travel times and improved safety,” Sunbury MP Josh Bull said.