Fiona Reid, from Seafield in West Lothian, was described by her heartbroken family as a "beautiful, caring" woman who was loved by many people.
The collision happened on the A7066 road near Bathgate at about 4:30pm on Monday, July 6th - and police are appealing for witnesses and anyone with dash-cam footage to come forward.
Police also confirmed today that Fiona was the driver of one of the cars and died in hospital on Tuesday, July 8th.
Fiona's family have shared a statement through Police Scotland which said: “We are shocked and heartbroken at the loss of Fiona. She was a beautiful, caring woman who was loved by many.
“The family would like to extend their thanks to everyone who has contacted them with kind messages of support, it just shows how much Fiona was admired.
“We would also like to thank the emergency services and other motorists at the scene who assisted Fiona.
“This has been a major shock to us and we would appreciate our privacy at this time.”
Sergeant Paul Ewing, of Lothians Road Policing, said: “Our thoughts are with the family and friends of those involved with this incident.
“We have already spoken to a number of witnesses about the crash but would still appeal to anyone who has any information on exactly what happened.
“I would also ask anyone that has any dashcam footage that could assist with our investigation to get in contact.
“Police can be contacted on 101 quoting incident number 2397 of Monday, 6 July, 2020."