For the next 19 days, the Sandringham rail line will be shut down while the eastern Metro Tunnel entrance at South Yarra Station is being built.

Busses will replace trains between Flinders Street and Sandringham from 8pm tonight until 7am on June 9. Passengers travelling on the line are being told to plan for up to 60 minutes of extra travel time.

“The creation of the tunnel entrance will be a major step forward in linking the Sunbury and Cranbourne Pakenham lines to add capacity for more than half a million extra trips on the network every week,” says Minister for Transport Infrastructure Jacinta Allan in a statement.

More than 160 metres of tracks, overhead signalling and ballast will be removed to create the eastern entrance’s foundations. The roof and the approach slab at the tunnel entrance will be created from 400 cubic metres of poured concrete.

When the entrance is finished the new works will be buried and the tracks reinstated.

The government says that when the Metro Tunnel is finished it will save Sandringham line passengers up to 20 minutes a day. It also promises room for an additional 72,000 more passengers during peak travel times.

The new line closures follow on from major works in April that saw nine Melbourne train lines close, affecting 1.5 million people.

Detailed travel information can be found at ptv.vic.gov.au.