Police are calling for witnesses to a fatal crash on the Mitchell Freeway in Gwelup on Saturday where a ute flipped, crashed through train barriers and landed close to train tracks.
The horror smash, which happened just before 3pm, saw the freeway shutdown and trains suspended while emergency crews worked to free the man from the wreckage.
They had to remove the vehicles roof to get to the 34-year-old male driver, however the man suffered life threatening injuries in the crash and died shortly after being rushed to Royal Perth Hospital.
The crash occurred when a white late 2000's model Toyota Hilux utility, was travelling south on Mitchell Freeway collided with a concrete barrier near the Karrinyup Road overpass, a police spokesperson said.
Witnesses told 9 News the vehicle became airborne as it clipped the barrier and rolled a number of times.
The Mitchell Freeway was blocked while emergency services attended the crash, with traffic stretching back for several kilometres.
Train passengers were left stranded with services cancelled between Stirling and Whitfords for more than three hours following the crash. Some drivers were spotted going the wrong way up a freeway on-ramp to escape the chaos.
Major Crash investigators are seeking witnesses who may have seen the vehicle driving prior to the crash.
Anyone with information is asked to call Crime Stoppers on 1800 333 000, or to make a report online.