Wiltshire Police are appealing for witnesses following a serious road traffic collision in Swindon that took place at approximately 9.30am on Wednesday 27 November.
Two vehicles were involved on the A3102 Great Western Way between the Blagrove and Mannington roundabouts.
A black Mazda being driven by a 57-year-old woman from the Haydon Wick area towards junction 16 of the M4 veered onto the Swindon-bound carriageway where it struck a red Seat being driven by a 40-year-old woman from the Christian Malford area.
The Mazda driver was taken to Frenchay Hospital in Bristol with serious internal injuries.
The Seat driver was taken to the Great Western Hospital in Swindon with a suspected punctured lung.
The collision is being investigated by PC Steve Cox of the Wiltshire Police Serious Collision Investigation Team based at Police Headquarters Devizes.
Anyone who witnessed the incident is asked to contact PC Cox on 101 or Crimestoppers on 0800 555 111 where information can be left anonymously.