Police Scotland are appealing for information following a serious crash on Barnsford Road in Paisley.
The incident happened around 5pm on Tuesday and involved a silver Nissan Micra and a white Kia Rio.
Emergency services attended, and a 77-year-old woman, the driver of the Nissan Micra, was taken to Queen Elizabeth University Hospital, where she remains in critical condition.
The driver of the Kia Rio, a 39-year-old woman, was also taken to hospital for treatment.
The road was closed while enquiries took place and re-opened around 9.10pm on the same day.
Sergeant Chris Hoggans said: “We are carrying out enquiries to establish the full circumstances of this crash and are appealing to anyone who witnessed the crash or who was in the area around the time to contact us.
“In particular, if you have dash-cam footage that could assist with our investigation, please get in touch.”
Anyone with any information is asked to contact 101, quoting reference 2376 of 9 January, 2024.