In the four years she owned the business, she said yesterday's crash was the worst but near misses were common and happened almost daily.
Mrs Borrmann said a green arrow rather than just the green light for vehicles turning right into Cameron St would help make the intersection safer.
"There are four lights at this intersection and all have green arrows except the one ... we've seen so many near misses and heard tooting horns and screeching brakes.
"It seems those turning into Cameron St don't realise they have to give way to traffic coming through. I hope something is done about it before someone gets seriously hurt."
Whangarei police were still investigating and late yesterday no charges had been laid.
Whangarei District Council said it would discuss the crash with police to understand if there were any road factors that may have contributed to the accident or any preventative action that could be taken.