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.
Nearly 50 tobacco stores closed, over five million cigarettes seized under new laws
Yarloop man fined thousands, rods forfeited over illegal fishing haul
Rockingham named a state hotspot for dog-related incidents against posties
Police uncover 2kg of meth during crackdown on impaired drivers in Mandurah
WATCH: Police release vision of Barragup arsonist
Local landholders encouraged to work together against invasive weed
Wellard family provided temporary accommodation after burst water pipe floods home
Elderly woman taken to hospital after crash on the Kwinana Freeway in Baldivis
Pop-up ice skating rink glides back into Mandurah for winter school holidays