A coroner has expressed thanks to highways officials for installing better signs at a roundabout in Bury St Edmunds where a woman was fatally injured in a crash last year.
Vivienne Bickerton, 24, was a front seat passenger in a car that failed to slow down enough to get around a roundabout in Compiegne Way, at the A14 junction.
The car went into a spin, struck a traffic island and hit a sapling followed by a larger tree on the passenger side.
On Thursday, an inquest at Bury St Edmunds heard that Miss Bickerton, of Arbury, Cambridge, appeared to have slipped her seat belt down from her shoulder before going to sleep and suffered serious internal injuries, dying less than an hour later.
Following the single vehicle accident in the early hours of July 22, police contacted Suffolk County Council to raise concerns about the signs warning drivers of the presence of the roundabout.
In a statement read to the inquest, accident investigator Pc Roy Daid said new advance warning signs telling drivers to slow down had been installed, together with extended chevron signs on the roundabout itself.
Assistant deputy coroner for Suffolk, Dr Dan Sharpstone said he wished to record his appreciation that Suffolk County Council had undertaken the safety improvements.
Dr Sharpstone ruled Miss Bickerton had died as a result of a road traffic accident.