The Federal Government is set to provide more than $1.6 billion towards WA road and rail infrastructure projects, including Labor's flagship transport plan, Metronet.

The funding is part of a $2.3-billion state and federal infrastructure deal, which includes a $700 million commitment from WA.

WA Premier Mark McGowan described the funding deal as a huge win.

"It is a congestion-busting masterpiece for our state. It will ensure there is more rail and more road projects that create jobs," he said.

Almost $1.9 billion will be redirected from the now-defunct Perth Freight Link and much of it will be spent on Metronet.

Mr McGowan said the funding would also go towards 16 other projects and create about 6,000 jobs.

Metronet support follows earlier attacks

State and federal Liberal MPs, including Finance Minister Mathias Cormann, heavily criticised Metronet in the past as they promoted the failed Perth Freight Link.

Prime Minister Malcolm Turnbull was among the critics, labelling Metronet little more than a press release.

But Senator Cormann today spoke of his support for Metronet and said it was a matter of working constructively with the new McGowan Government.

"The Metronet project does fit very well with the Turnbull Government's Smart Cities agenda, it does fit very well with our efforts to improve connectivity across our capital cities," he said.

"So we do believe there is more opportunity for us to work together in the future to deliver this project."

It is hoped many of the workers whose jobs have been affected by the scrapping of the freight link project can be redeployed on the new projects.

The Metronet business plan still needs be taken to Infrastructure Australia for approval, before $700 million in federal funds is handed over for the Thornlie link to Cockburn, and the line extension to Yanchep.

Metronet includes plans for rail lines to the Perth Airport and Ellenbrook in the city's north-east.