Bowyer and Livermore manager Tanya Martin has been working in the livestock agency's office on Stewart Street for three years and has witnessed two accidents outside the building during that time.

Councillor Warren Aubin this week reminded those parking on Stewart Street to be cautious after he saw a car that appeared to have its door bent backwards.

Ms Martin said the first accident she saw involved a hatchback "that ended up on its side in the middle of the highway".

"I think she was coming around the corner and someone hit her or something like that," she said.

"We just heard this very loud crash and we go out and there's this little hatchback on its side.

"So we had to obviously call the police and because there was no-one really about, basically I just grabbed a red book that I was working in at the time and stood in front of the car to try to stop the traffic from hitting this poor woman who was stuck sideways in her car."

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In the second incident Ms Martin witnessed, she said a ute pulled out from the chemist and collided with a station wagon being driven by a woman going to pick up her children.

"The tray of the ute ended up in the rear passenger window of this woman's car ... it was very fortunate that she didn't have her kids with her at the time," she said.

"They had to reverse the ute to get the actual tray out of her car. It was hectic."

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Due to the regular close calls she's seen, Ms Martin commutes to work via Lambert Street.

"I will wait at the traffic lights to turn left so at least I don't have as much traffic behind me when I go to pull in," she said.

"They're all sort of caused by the same thing - people slowing down to pull out or to pull in and people coming through doing 60 kilometres an hour on a dual-lane highway and hitting them."

Cr Aubin has urged drivers in parked cars to have a good look before opening their doors and to be patient.

He has said there is nothing Transport for NSW, which controls the road, can do to modify Stewart Street to expand the shoulder.