Vic money needed to match fed road cash

Victoria will have to find $1.5 billion to match the federal government's plans for road and rail upgrades in the state.

Prime Minister Malcolm Turnbull said the money meant for the dumped East West Link would stay in Victoria but be used for new projects.

A third of that $1.5 billion will be committed to a $1 billion widening of the Monash Freeway, on top of the current $400 million expansion of the M1 corridor in Melbourne's east.

"On the western side of the city we are offering to invest $350 million, again to be matched equally by the Victorian government, to upgrade the Western Ring Road," Mr Turnbull told reporters on Friday.

Canberra will also chip in $220 million to upgrade 1000km of freight rail in the Murray Basin.

Victorian Treasurer Tim Pallas welcomed the money but the state needs more details about the proposed projects.

"We're happy to talk about that, but our very clear intention is that we will proceed with the works that we've (already) got," Mr Pallas told reporters.

"There's a distinct lack of clarity around the enhancements on the Monash, we'll need to work through that."

The prime minister said $3 billion was still available for any future government that wanted to build the East West Link.