Central Goldfields Crime Investigation Unit is asking for information over a ramming incident Saturday morning near Moliagul.
The victim, a 54 year old woman from White Hills, was driving her vehicle west on the Wimmera Highway 10:20am when she passed a dark blue sedan parked on the side of the road.
For 5 kilometres the woman was followed by the offending vehicle, before it began to run into her car multiple times.
When the victim tried to leave the road, her car's been rammed so hard she's swerved onto the other side of the road and rolled into bushes.
The offender's then sped off.
The victim suffered minor injuries and required hospitalisation.
At this stage, detectives believe it was an unprovoked attack but they want to talk to anyone who may have more information.
Crime Stoppers on 1800 333 000 or make a confidential report at www.crimestoppersvic.com.au