Mrs Hay was parked on Green St, near her child's school, and saw the man driving his scooter on the road, in the opposite direction of the parked cars.
''I was about to pull out and he came towards me.''
The man was not crossing the road and if she had pulled out, she would have hit him, she said.
She followed the man, intending to call police, but lost him in a block of flats.
She was concerned for him, especially after an 88-year-old Mosgiel man died after a light truck was in a collision with his mobility scooter in Mosgiel earlier this month.
The man was one of many mobility scooter users in Mosgiel with bad driving behaviour, she believed.
If anyone saw bad driving, it should be reported to police and repeat offenders needed to be stopped, she said.
''If they are doing it all the time, they shouldn't be riding a scooter.''
Mosgiel Taieri Community Board member Sarah Nitis said the board was lobbying the Dunedin City Council to give $2million in its Long Term Plan to improve ''safety and accessibility'' in Mosgiel.
She hoped the money would make Mosgiel safer for everyone, including mobility scooter users.
She believed some people drove their scooters on the road because some footpaths in Mosgiel were not fit to travel on.
She urged Mosgiel residents to call the council about substandard foot-paths so that repair work could be prioritised.
Senior Constable Karren Bye, of Mosgiel, said she had not received any complaints about bad driving by mobility scooter users in Mosgiel.
Police had not focused greater resources towards mobility scooter safety following the recent fatality, Snr Const Bye said.
''We have fatalities with bikes and we don't jump on that bandwagon.''
She had given brochures on safety to mobility scooter users and two users had refused to take the information.
She urged people with concerns about bad driving of mobility scooters to contact her, but she feared mobility scooters users could be discriminated against.
''Let's look after each other,'' she said.
