He was arrested in connection with the incident on London Road at around 2.25pm on Friday (September 14).Â
The man has since been released under investigation by the police.Â
A 60-year-old woman suffered a serious head injury during the accidentÂ and was taken to the major trauma centre at University Hospital Southampton.Â
Police were called to the scene followingÂ an accident between a car and pedestrian.Â
The car, a Honda Insight, did not stop at the scene but wasÂ located later on Friday.Â
London Road was partly closed between Stubbington Avenue and Kingston Crescent on Friday afternoon with policeÂ diverting traffic through the side streets.
Sue Taylor, Â who works at Portsmouth Laundry, said: '˜I heard an almighty bang. I was out the back.
'˜The lady looked in a pretty bad way.
'˜It is not what you would expect on a Friday afternoon.
'˜It's really shook me.Â The noise I heard it wasn'tÂ a nice sound.'Â