Bunbury police are investigating a fatal crash that occurred on South Western Highway, Waterloo on Monday, September 9.
About 10.25am, a blue 2010 Scania truck, towing two trailers, collided with a 2017 white Hyundai Santa Fe station wagon near the intersection of South Western Hwy and Wireless Road.
The sole occupant of the Hyundai, a woman in her 50s, died at the scene.
The truck driver was treated for minor injuries.
Investigators are calling for anyone with dashcam footage of the incident to call Crime Stoppers on 1800 333 000 or via crimestopperswa.com.au