A 26-year-old woman from Stamford was arrested for testing positive for cocaine after a crash on the A15 near Thurlby.
Officers rushed to the scene of a single vehicle collision just after 7pm on Sunday, March 4.
Three small children were in the car, but fortunately there were no injuries.
No charges have bee brought forward and the woman has since been released under investigation, police said.
Sergeant Dan McCormack who attended the incident, tweeted about the arrest.