The utility vehicle received significant damage in the crash and the trailer and skidsteer were slammed sideways through a roadside fence, with the earthmoving machine coming to rest on its side.
Senior Constable Harvey Pope said the male driver had escaped injury in the crash and along with firefighters and an ambulance, there had been a police photographer at the scene as part of an investigation in to the cause of the crash.
The scene was strewn with a tangle of high voltage lines brought down in the crash.
Traffic was detoured after the second collision, Mr Flowerday said, which highlighted the danger motorists and emergency workers face at crash scenes.
"We get it so often when we're working at the roadside and busy," he said.
"It shows the dangers for the public and emergency workers, especially in those conditions with a slick road and poor visibility."
Mr Flowerday said the male driver involved in the first collision had been lucky to escape injury and the woman was fortunate her injuries were not worse.