The incident, close to Hubbard’s Hills, involved a grey Skoda Octavia, which was believed to be stationary on the northbound side of the road, and a silver Mitsubishi L200 also thought to be travelling northbound.
Following the collision at 12.12pm on Saturday, the woman – who was a passenger in the Skoda and was from the Sheffield area – did not survive her injuries.
The driver of the Skoda was taken to hospital with injuries which police have described as not life-threatening.
Anyone who witnessed the collision, or who has dash-cam footage, should contact Lincolnshire Police as it may prove crucial to their investigation.
If you can help, there are a number of ways to contact the police:
• Call 101, quoting Incident 219 of 25 September
• Email [email protected]
• Call Crimestoppers, anonymously, on 0800 555111.