The 33-year-old woman injured in the collision on the Ashby Ville roundabout at the junction of the A18 and Brigg Road earlier today has died.
She was travelling as the front seat passenger in a black Hyundai coupe car when it collided with street furniture at 1.40am.
The driver of the car, a 23-year-old man, has been arrested on suspicion of driving over the prescribed alcohol limit and is in custody at Scunthorpe Police Station.
The vehicle had travelled along Brigg Road towards the roundabout but before arriving at the roundabout appears to have lost control and collided with a central island and street furniture.
Police need to speak to any witnesses to the incident and ask that anyone with information rings 101 referring to log 35 of Monday July 25.