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.
Last call for donations to support Mandurah's homeless
State Government commits to building $5 million electrical training facility at Rockingham TAFE
McDonald's approved for Dawesville
Wanted man known to frequent Kwinana, Mandurah and Rockingham areas
Mandurah woman completes grueling English Channel swim
Man and child seriously injured in South West crash
Motorists warned to expect delays during Kwinana Freeway upgrades
Driver injured in Serpentine crash
Man and woman wanted for questioning over Lakelands car theft