A 21-year-old man has died in hospital after being hit by a car along the Mitchell Freeway.

The man was changing a tyre in the northbound emergency lane near Stirling Train Station early yesterday morning, when a white Toyota Prado crashed into his vehicle, crushing him.

He was rushed to Royal Perth Hospital, but has died overnight.

The drivers of both vehicles, a 32-year-old man and a 38-year-old man, were not injured during the crash.

Anyone with information or dashcam vision of the crash is urged to contact Crime Stoppers on 1800 333 000.

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A 21-year-old man is in a critical condition, after he was hit by a four wheel drive while changing a tyre.

The horror smash shutdown a number of lanes on the Mitchell Freeway. @Kelly9Williams @lourennie9 #9News pic.twitter.com/Q07fCEns3K

— 9News Perth (@9NewsPerth) August 29, 2021