Thames Valley Police is appealing for specific witnesses to a road traffic collision on 2 June in Milton Keynes.
At around 7.50pm on the A5 northbound between Redmoor roundabout and Portway Roundabout a grey Mercedes van collided with silver Toyota IQ, which resulted in the Toyota rolling onto its side.
Officers are appealing for witnesses who stopped and helped the female driver out of the Toyota.
No injuries were sustained by those involved in the collision.
A woman aged 25 from Walnut Tree, Milton Keynes, was arrested on suspicion of being unfit to drive under the influence of drugs and has been bailed until 20 September.
If you have any information please contact PC James Clarke from Roads Policing via the Thames Valley Police Enquiry Centre on 101.
If you don’t want to speak directly to the police you can contact the independent charityCrimestoppers (opens new window) anonymously on 0800 555 111. No personal details are taken, information is not traced or recorded and you will not go to court.