Police are investigating a single car crash in St Marys last week. About 2pm on Wednesday, August 31, police were called to an accident in Queen St, St Marys. A 52-year-old St Marys woman was driving in Queen St when she allegedly had a medical episode and lost control of the vehicle. The car mounted the gutter and collided with a bollard on the footpath. The woman was taken to Nepean Hospital in a stable condition. Investigations are continuing.