Mr Purcell told Parliament this week that the high speed intersection where Southern Cross Road meets the Koroit-Mailors Flat Road was one of the most dangerous in the region and needed immediate attention.
"I have asked the Minister to immediately act to install warning flashing lights to slow drivers coming into this intersection," Mr Purcell said.
Koroit residents have been fighting for changes at the dangerous intersection since 2013. It has been the scene of many high speed accidents, including a recent crash in May where three people were hospitalised.
"This is a high speed intersection and has been the scene of numerous accidents. I have no doubt it will be the scene of a fatality if upgrades are not undertaken," Mr Purcell said.
Residents and the Moyne Shire Council have proposed numerous solutions for the dangerous intersection including replacing the Give Way signs with Stop signs, speed bumps to slow traffic, offsetting the intersection and installing flashing lights.
"Large trucks frequently travel at speed through this intersection. It's only a matter of time before there is a serious accident here and no one wants to be the one saying I told you so," he said.
Mr Purcell presented the Minister for Roads with a list of the 10 worst roads in south west Victoria in Parliament this week. He said he hopes a concise list will be enough to kick start some action, but plans to keep raising the matter in Parliament until something is done. The Southern Cross intersection is included in his list.