The Forensic Crash Unit (FCU) are investigating following a two-vehicle traffic crash in Marcoola on 5 August.
Initial investigations indicate around 7.20pm, two vehicles, traveling in opposite directions, collided on the Sunshine Motorway.
The driver and sole occupant of a white Mazda 121, a 42-year-old Pacific Paradise man, was taken to the Sunshine Coast University Hospital in a critical condition.
A 22-year-old Victoria man, who was the driver and sole occupant of a black SsangYong Musso, was not physically injured in the crash.
The FCU are appealing for anyone with information or relevant vision of the crash to contact police.
