Main Roads has also closed South Western Highway northbound, south of Boyanup.
A man in his 20s is being rushed to Royal Perth Hospital by the RAC rescue helicopter after being hit by a truck.
Around 7:30 this morning the truck struck a pedestrian at the South Western Highway and Shenton Road intersection in Boyanup.
The victim sustained head and back injuries in the crash.
Police remain on site with traffic management in place.
Main Roads advises motorist to seek an alternate route.
Kwinana Recquatic's swim school recognised nationally
Kwinana Recquatic's swim school has been recognised nationally at the Australian Swim Schools Association Awards on the Gold Coast.
Rockingham Police: Locals advised not to approach wanted man
Rockingham Police are appealing for the public's help to locate a 24-year-old man.
Concerns for missing girl
WA Police are asking for the public's help to locate a missing 12-year-old girl.
Peel Thunder cruise into 2026 WAFL grand final
Peel Thunder have cruised into the 2026 WAFL grand final after defeating Claremont by 28-points in a semi final showdown at Lane Group Stadium on Saturday.
Two teens cautioned, one charged over brutal Falcon attack
Two boys aged 13 and 14 have been cautioned and another charged over an alleged shocking attack on a man in a car park in Falcon.
Nearly 100 new rentals to be built in Mandurah
Mandurah will soon be home to almost 100 new rentals as part of a State Government initiative to boost housing in the region.
Blue swimmer crabs off limits during season closure
Recreational fishers are reminded not to catch blue swimmer crabs during the annual spawning closure from September 1 to November 30.
Fire crews on scene of Meadow Springs house fire
Firefighters are on the scene of a house fire in Meadow Springs.
Perth's southern suburbs declared One Nation's 'heartland' after Secret Harbour by-election victory
One Nation's Luke Herdegen has declared Perth's south as the party's "heartland'" after a significant Secret Harbour by-election victory.