The Forensic Crash Unit is investigating a fatal crash at Kolonga, west of Bundaberg on Sunday, January 21.
Initial investigations indicate around 11:45am, a Mitsubishi Triton was travelling southbound on the Bruce Highway near the Kolan River before it lost control and went off the side of the Kolan River Bridge.
Emergency services were able to reach the partially submerged vehicle in the afternoon and located the driver and single occupant, believed to be a 51-year-old Mount Cotton woman, who was declared deceased.
The Forensic Crash Unit is investigating the circumstances of the crash, and are appealing to anyone who may have witnessed the incident, or have relevant CCTV/dashcam footage, to come forward.
Investigations are ongoing.