Police are investigating the death of the 34-year-old St Albans man, who was struck by the truck on the Western Ring Road in the early hours of Tuesday morning.
It is believed the man, who was travelling in the rear driver’s side passenger seat, asked the driver to pull over as he felt sick.
The driver pulled up in the emergency lane between Sydney Road and Widford Street at 12.50am and the man got out of the car.
Investigators believe that the man stepped out too far into the left running lane where he was struck by a passing truck.
The man was taken to hospital but died shortly after arrival.
Acting Senior Sergeant Dean Pickering told Channel 7 that alcohol may have been a factor.
“It appears that the fellow who has been hit by the truck tonight has been indulging, so to speak,” he said.
“As a passenger obviously no issues with drink driving, however it seems that he may have needed to stop for an emergency pit break, so to speak, has opened the car door, has maybe lost his presence of where he was and has literally stepped in front of the truck.”
The truck driver, a 57-year-old Sunbury man, provided a statement to police and was allowed to leave.
The driver of the car, a 31-year-old St Albans man, was conveyed to Fawkner police station for a breath test which returned a positive reading of 0.153 per cent.
The three other passengers in the car were not injured.
Sergeant Pickering also warned that emergency lanes can be dangerous.
“We see people stopping to take phone calls in emergency lanes, or stopping to do all sorts of crazy stuff … stopping at the airport because they don’t want to pay for parking.
“It’s not worth putting your life on the line in an emergency lane unless it is very much a last resort.”