Prime Minister Scott Morrison has announced nearly $100 million in funding for upgrades to Perth's transport infrastructure, during a three-day campaign tour of the city.

The 'congestion-busting package' includes $96 million in upgrades to ease road bottlenecks at Hazelmere, Alkimos and Kewdale, widening of the Kwinana and Mitchell Freeways, and a new train station on the Mandurah line.

In a statement, Mr Morrison said the funding was to ensure people spend less time on the road.

"Removing pinch points and bottlenecks will make a real difference to the lives of people living in fast-growing suburbs," he said.

"This will help families and businesses get back valuable time."

The improvements include:

$50 million for the next section of Kwinana and Mitchell Freeway widening

$50 million for the next section of Kwinana and Mitchell Freeway widening $20 million to extend Lloyd Street in Hazelmere

$20 million to extend Lloyd Street in Hazelmere $13.25 million to upgrade a 3 kilometer stretch of Abernethy Road in Kewdale

$13.25 million to upgrade a 3 kilometer stretch of Abernethy Road in Kewdale $10 million towards construction of Lakelands Station on the Mandurah rail line

$10 million towards construction of Lakelands Station on the Mandurah rail line $2.5 million to improve traffic flow at Shorehaven Boulevard and Marmion Avenue in Alkimos

The Federal Government has announced nearly $100 million in transport infrastructure upgrades. ( ABC News: Rhiannon Shine )

Cities, Urban Infrastructure and Population Minister Alan Tudge said congestion was a growing problem in Perth.

"The Urban Congestion Fund is designed to eliminate congestion issues where they are hurting most — not only the major freeways but the local pinch points which can provide daily headaches to commuters," he said.

"These investments are about managing the flow of vehicles onto, through and out of the freeway corridors to maximise the network's performance."

The Government said the funding added to its commitment to spend $11.2 billion on transport projects across Western Australia between 2013–14 and 2027–28.