Firefighters had to use airbags to free a badly injured man who was trapped under a van after a road accident.
Police are today trying to establish how the Rossington pedestrian came to be crushed under the vehicle on a busy trunk road.
Carr House Road in Belle Vue and Hyde Park was closed for three hours while investigations were carried out.
The 31-year-old pedestrian was seriously injured, although South Yorkshire Police have not specified the nature of his injuries.
The incident occurred at around 11.40pm on Monday close to the junction of Carr House Road and Danum Road.
A white Nissan Vanette panel van was travelling on Carr House Road towards the racecourse roundabout, when the 63-year-old driver was involved in a collision.
“A male pedestrian was allegedly in the road, near to the junction with Danum Road,” said a police spokesman.
“The 31-year-old sustained serious injuries and was taken to hospital.”
Police officers who were first on the scene immediately realised they needed specialist assistance, and a South Yorkshire Fire and Rescue crew from Doncaster station attended within minutes.
They called for back-up from the technical rescue unit but, before it arrived, they were able to utilise pneumatic airbags to lift the van from the injured man so paramedics could treat him.
The operation took less than 20 minutes and the pedestrian was taken to Doncaster Royal Infirmary. His condition yesterday afternoon was described by a police spokesman as ‘stable but critical’.
Carr House Road from the racecourse roundabout to the Trafford Way junction was closed until 2.30am and traffic was diverted along Bennetthorpe and through town.
Police investigating the circumstances surrounding the incident said the van driver had not been arrested and no other vehicles were believed to be involved.