The government should spend millions of dollars building two lifts at Dapto station, said Shellharbour MP Anna Watson, rather than opting for a less-expensive option that would provide a similar level of access.
On Tuesday the Mercury reported that, contrary to an earlier artist's impression, Dapto station would not be getting two lifts.
Instead work would be done on the level crossing and one of the ramps to ensure they complied with federal legislation on disabled access to public transport.
Under that legislation Dapto station is not wheelchair accessible due to issues with the level crossing and the western ramp's gradient.
However, Ms Watson said the government should still build the lifts - even if they cost million of dollars more.
"It's not about being the more expensive option, it's delivering what they promised to deliver," Ms Watson said.
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"You don't tell a community that they're going to receive these two new sets of lifts but then say, 'hang on, we'll just go the cheaper option'.
"They announced it on the first of March and we're now 50 days into the term of this government and they're already breaking their promises."
On March 1, the Berejiklian government announced 68 train stations - including Dapto - would receive an access upgrade under its Transport Access Program.
However, the announcement did not specify what form the upgrade at Dapto would take.
An artist's impression showing lifts was released by Transport for NSW last month, albeit with a disclaimer that said it was "subject to detailed design".
The Mercury is unaware of a specific commitment to install lifts at the station.
Ms Watson said she doubted the effectiveness of improving the western ramp - even though the eastern ramp was successfully altered to make it wheelchair accessible back in 2013.
"If you look at where the existing ramps are, there's simply no opportunity to have a long ramp at a lower gradient," she said.
"I don't know how they're going to give that same level of access, that same ease of access, any other way [than installing lifts]."