She said if the "blister" was removed the problem would be solved.
"We've asked council to remove that bulge at the end of Kelsi St because we believe it's creating a dangerous traffic situation," Mrs Knuth said.
Lance Attrill's company has been involved in part of the subdivision, and he said there had been some heavy traffic movements in the initial stages but that work was finished.
"The major earthworks are done and from now on the only traffic will be those involved in building the house and then the residents moving into them."
Rui Leitao, council's roading manager, said while there were heavy vehicles using Kelsi St during the construction of the new subdivision, "this is short-term and it isn't expected that there will be large vehicle movements after the subdivision is completed".
He said Kelsi St was categorised as a suburban street for "live and play" use and for a road serving up to 200 dwellings it has been designed to create a target operating speed of 40km/h.
He said roading guidelines recommended a width of 5.5m-5.7m.
"Simon St is similar to the guideline width. However, the narrowest point of Kelsi St is near the intersection where it is approximately 7.1m wide.
"It is not recommended that Kelsi St should be widened to maintain a suitable environment for the residential area after the subdivision is completed," Mr Leitao said.