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.
Unregistered painter fined for requesting hefty deposit from Singleton homeowner and not doing the job
Police hunt driver following dangerous Baldivis pursuit
Welfare concerns for boy last seen at Port Kennedy skate park
Rubbish truck catches fire in Baldivis
Driver injured in bus crash in Rockingham
Lark Hill Sportsplex to undergo $3 million floodlighting upgrades
Arson Squad investigate Bunbury house fire
Construction begins on new Mandurah Hospital
Rockingham Flames men advance to NBL1 West grand final