A father-of-two has died days after he was stabbed multiple times in a horrific road rage attack on an Adelaide street.

Troy James McLean, 34, tried to drive himself to hospital while bleeding profusely, but crashed into a parked car just metres before he got there.

The owner of the car he drove into found him slumped behind the wheel when he went to confront him soon after the stabbing at 10.40am on Saturday.

Benjamin Joshua George, 25, allegedly stabbed Troy James McLean to death in a horrific road rage attack on an Adelaide street

McLean tried to drive himself to hospital while bleeding profusely, but crashed into a parked car just metres before he got there

Mr McLean was rushed to Royal Adelaide Hospital in a serious condition and had emergency surgery while clinging to life, but died on Tuesday.

Charges against Benjamin Joshua George who allegedly stabbed him during a roadside argument will be upgraded to murder.

The 25-year-old allegedly stabbed him before driving off and leaving Mr McLean badly injured at a busy intersection.

George begged the victim's family for forgiveness as he appeared in court on Monday, saying 'can I just say I'm sorry to everyone'

Mr McLean's bloodstained car that he tried to drive to the hospital after he was stabbed

He begged the victim's family for forgiveness as he appeared in court on Monday, saying 'can I just say I'm sorry to everyone', according to the Adelaide Advertiser.

George was remanded in custody to face court again in January, causing his family to burst into tears as they watched from the gallery.

Magistrate Yoong Fee Chin said George could apply for bail at a future court date.