It is part of a $100 million road and rail package.
Scott Morrison is set to announce the package for WA today.
The Prime Minster is currently in WA on a three day blitz of the state.
The package is set to widen the Kwinana and Mitchell Freeways, and upgrade bottlenecks at Hazlemere, Alkimos and Kewdale.
It will also fund a new train station at Lakelands on the Mandurah Line.
The Prime Minister started his tour of WA yesterday with a visit to the Henderson ship yards and a politics in the pub event last night.
He'll wrap up his visit tomorrow.
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