The first few days on the platforms of Sunshine railway station will be quiet for Melbourne's newest protective services officers – there will be no trains.

The acting Premier, Peter Ryan, announced that Sunshine would get the latest round of PSOs from 6pm on Tuesday, yet buses will replace the trains until Sunday.

The Sunbury line between Albion and Footscray will be closed while contractors complete work for the regional rail link, including track, bridge earth works.

"The trains are not actually running at the moment because of the work being done, very obviously, on the regional rail link, but they will be back here within the next few days," Mr Ryan said.

"And it will be a terrific thing that, at last, people of the Sunshine can have available to them the many benefits offered by the presence of the protective services officers," he said.