Police were called to Poolstock Lane at arond 6.30pm on Saturday (July 18) to reports of a collision between a petrol scooter and a silver Ford Galaxy.
A 53-year-old man – who had been riding the scooter – was taken to hospital with serious head injuries. He remains in a critical condition.
The driver of the Galaxy remained at the scene to speak with officers.
Nobody has been arrested and enquiries are ongoing.
Police are now appealing for anyone with dash-cam footage to come forward.
Police Constable Neil Pennington, of Greater Manchester Police’s (GMP) Serious Collision Investigation Unit, said: “A man is currently fighting for his life in hospital after yesterday’s collision and our thoughts are very much with him and his family as he receives treatment.
“We’re working hard to piece together the circumstances surrounding this incident and are asking any witnesses or anyone with information to get in touch.
“If you have dash-cam footage of either vehicle in the area around the time of the collision, please give us a call as it could really assist with our enquiries.”
Anyone with information should call GMP’s Serious Collision Investigation Unit on 0161 846 4741 quoting incident number 2714 of July 18, or Crimestoppers on 0800 555 111.