Mr Park was at Helensburgh station on Thursday to announce a funding promise of $5 million to "formalise" parking, which he hoped would result in at least 20 extra spaces.

He said a Labor government would also work with Wollongong City Council to improve pedestrian access to the station.

The $5 million for the car park upgrade at Helensburgh would "hopefully" be in the first budget of a Labor government, he said.

Mr Park said the parking situation at Helensburgh had worsened since the 2013 timetable revamp which turned it and Thirroul into hub stations.

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The result was, rather than using the local trains to get to the hubs, commuters simply drove straight to the hub stations which worsened the parking situation in surrounding streets.

A commuter car park was built at Thirroul as a direct result of the increase in commuters driving to the station.

He said he and Transport spokeswoman Jodi McKay had committed to revise the timetable "as soon as possible", should they win the March election.

"We will be reviewing services to see if we can take a little bit of pressure off Helensburgh in the same way we want to take off some pressure off stations like Thirroul," Mr Park said, "to maximise the use of spaces in and around this corridor, not just here at Helensburgh."

He said the review had resulted in people driving past local stations with infrastructure like car parks - which had been provided by the government - to head to the hubs.

The timetable review would take into account a commuter's total journey time - including travelling to the station - and not just the time spent on the train.

"We’ve got to have a look at what stations we've got around the existing precinct and whether we can maximise their use," Mr Park said.

"That may mean there are additional stops down the road, that may mean a slightly longer journey. We hope that’s not the case."