Two dead after crashes on WA roads

A woman has died in a head-on collision with a car that crossed onto the wrong side of a Perth road.

Police say the woman in her 30s was driving south on North Lake Road in Bibra Lake about 8.20am when a ute drove into ongoing traffic.

A spokeswoman said the woman died at the scene and a man in his 40s was taken to Fremantle Hospital with non-life threatening injuries.

In a separate incident, a 50-year-old man was killed in a rollover on Monday afternoon.

Police said the man was driving on Blackwood Road heading towards Kojonup in the South West region when he lost control of his car.

In a third crash, a 18-year-old man was airlifted to Royal Perth Hospital about 12.40pm on Tuesday after his powered bike was involved in a collision with a truck at the Thomas Road and Tonkin Highway intersection in Byford.

The teenager has serious, possibly life-threatening injuries.

The 46-year-old truck driver is assisting police with their inquires.