Diane Donaldson said she has no intention of taking it down.
She would consider painting the sign directly onto the fence - although that would be an extreme measure.
"It's on our property. What's the difference between me having a sign on my fence and me painting it on my fence?"
Said Rachel Donaldson: "It's really disappointing. I wouldn't have thought the sign was so offensive that it would've caused someone to complain, especially with the political billboards, real estate agents and signs to quit smoking all over the place."
Rachel Donaldson has been at the helm of a campaign to bring attention to dangerous driving and red light running in the area.
She has put up four other signs in the area, none of which have to be taken down.
Innes Ward city councillor Pauline Cotter said she is "extremely disappointed" that the city council has ordered its removal. She was not aware of it until contacted by Nor'West News.
"The signs are brilliant, they bring attention to the problem, which the profile has been raised by the community," she said.
She said the Papanui-Innes Community Board is working on a plan to address the wider issue in preparation for an increase in motorists when the Northern Arterial work is complete.
Until then she didn't see a reason the sign should go.
The city council won't comment on the matter.
"As this matter is currently under investigation, no further comment can be made at this time," adviser of regulatory compliance Claire Le Grice said.