The joint federal and state funding for the Melbourne Airport rail link and Geelong Fast Rail – amounting to $14 billion – was evidence that"there is a lot of money being spent in these communities,"he said.

The expansion of the urban growth boundary by successive Victorian governments has enabled runaway growth in the west of Melbourne,but a lack of employment options means a large number of residents commute to the city for work.

The demand for rail also increased after the opening of the Regional Rail Link in 2015,which saw two new tracks built between Southern Cross and Sunshine and the opening of Wyndham Vale and Tarneit stations.

The added capacity was quickly taken up by commuters,with Melton patronage growing from 75,000 in 2015 to 129,000 in 2018 and Wyndham Vale rising from 95,000 to 166,000.

Five years on,there is barely room to run more services on the Regional Rail Link tracks,with 17 trains running per hour of a total capacity of 18.

Public Transport Users Association Geelong convenor Paul Westcott said electric tracks between Sunshine and Wyndham Vale should be"open to commuters within five years maximum,along with Melton electrification".

"It's called the Western Rail Plan,but if there's a plan then what are the timelines? Where is the overall concept and how does the current announcement on Geelong Fast Rail fit in?"

The Andrews government came under fire forwithholding a key part of this year's state budget papers this year,which normally outlines the state's capital works program,including expenditure on major projects.

Transport Infrastructure Minister Jacinta Allan said on Friday the papers were withheld"on the advice of Treasury and Finance".

"They felt it was appropriate to have the recounting of those projects in the 2021 budget,which is only a few months away."

It follows the leaking of separate caches of internal government documents toThe Age, revealing the$6.7 billion West Gate Tunnel faces a $3 billion blowout,whilethe $11 billion Metro Tunnel faced similar overruns,with the government believed to have paid the project's builders an extra $1 billion to resolve a protracted dispute over costs.

Ms Allan said once negotiations concluded on both major projects,the government would confirm the extra cost to taxpayers.

When asked about for a guarantee on whether the protracted dispute between Transurban and its builders on the West Gate Tunnel would be resolved by the end of the year,Ms Allan said the government has told the companies that it wanted a resolution as soon as possible.