Though it is unclear when they will arrive.

In response to questions raised at a budget estimates hearing, Transport Minister Andrew Constance said work was under way to improve the South Coast line.

READ MORE: South Coast is the end of the line for new trains

“The NSW Government is investigating improvements on the South Coast line as part of Stage 2 of the More Trains More Services program,” Mr Constance said.

“This program will not only investigate providing additional services for South Coast customers but also better connections and improved local services.”

Part of the investigations include the already-announced $880 million that will be spent on improving signalling on the T4 Illawarra line to allow trains travel closer together.

“Future stages of the program will look to deliver a 30 per cent increase in peak services on the T4 Illawarra line which is an increase of five trains an hour, with more services for South Coast customers,” Mr Constance said.

A Transport for NSW spokesman declined to offer specifics on what other measures for the South Coast line were being considered or offer a concrete time frame for when extra services would be seen.

“With demand for trains increasing, we’ve been working hard to identify further service improvements that can be delivered for South Coast customers,” the spokesman said.

“Providing improved services for South Coast customers is a key focus of the More Trains, More Services Program.

“We’ll continue to keep the community up to date as this important work progresses.”