Police are urging drivers travelling on the M8 around the time a man walking on the carriageway was knocked down to come forward.
The 29-year-old was killed when he was struck by a blue Seat Leon car driving westbound on the motorway at around 1.50am on Sunday, January 30.
Emergency services attended, but the pedestrian was pronounced dead at the scene mear to Junction 6 Chapelhall in North Lanarkshire. His next of kin have been made aware.
Police said the driver of the car was uninjured but left “very upset” following the incident.
Officers are still working to establish the full circumstances of the incident and urged drivers who have not yet come forward to get in touch.
They said they are specifically keen to speak with a lorry driver travelling on the M8 at the time.
Sergeant John Houston said: “From our enquiries, we are aware there were other vehicles, in particular a HGV lorry, travelling on the carriageway around the time of the incident and I am asking that lorry driver and other motorists to contact us.
“It is entirely possible that they may not have been aware that a man was struck, but we would ask that if you were travelling along the road in the early hours of Sunday morning, January 30, then please get in touch.
“We are especially keen to hear from motorists with dash-cam devices as their footage could have captured images which could prove to be significant in our enquiries.”
Anyone with information is asked to call Police Scotland via 101, quoting incident number 0449 of January 30 2022.