Police are appealing for witnesses following a fail to stop collision which occurred on the M4 westbound between Leigh Delamere services and junction 18.
At approximately 12.20pm on Saturday 6 August, a black Vauxhall Corsa was travelling westbound in lane three when a blue van, which was travelling in the middle lane, began changing lanes, moving into lane three and forcing the Corsa to move towards the central reservation.
The driver of the Corsa, a 25-year-old woman from the Bristol area, then lost control of her vehicle and collided with the central barrier before coming to a stop in the carriageway.
Passing motorists were able to help the driver and the occupants of the Corsa onto the hard shoulder.
The blue van failed to stop at the scene and carried on towards junction 18.
PC Gary Rosier, of the Roads Policing Unit, said: “Fortunately nobody was injured, but the driver was shaken and in shock due to the collision.
“If anyone witnessed this incident and can provide details of the blue vehicle involved, please contact police immediately. The information you have may be crucial to our investigation.”
Anyone with information should call PC Rosier at Police Headquarters on 101, or Crimestoppers anonymously on 0800 555 111.